tag:blogger.com,1999:blog-61886779605424880602024-03-18T21:53:12.869-05:00Kellye's Physics Blogkellyemhttp://www.blogger.com/profile/09409770495405049032noreply@blogger.comBlogger16125tag:blogger.com,1999:blog-6188677960542488060.post-85133768730286735502010-05-18T09:48:00.000-05:002010-05-18T09:48:51.308-05:00Direct Current Circuits Relfection<div style="border-bottom: medium none; border-left: medium none; border-right: medium none; border-top: medium none;">We have just finished a unit on electricity and cirtuits. We learned about DC circuits, or direct current circuits. These circuits always have a battery, wires, and and a resistor (usually a lightbulb). They can also have a voltmeter, ammeter, different types of resistors, many batteries, and many other things to make the circuit interesting. In the diagrams below, I have examples of three types of direct current circuits: a series circuit, a parallel circuit, and a complex circuit (a combination of both). </div><div style="border-bottom: medium none; border-left: medium none; border-right: medium none; border-top: medium none;"><br />
</div><div class="separator" style="border-bottom: medium none; border-left: medium none; border-right: medium none; border-top: medium none; clear: both; text-align: center;"><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEjAEnOAlx3L81IsIB26-ikxaHqS0QS98jKYuoymiW3mSkBRI1EEV7eYEZgEKyBFgE1s5GafncQESRigpdLI1U-Sql2EOMVfO5ADEYW8lUk9KokUoVS6l14I33lgJiFbLufNMSOnfHaFHl4x/s1600/physics+pic+5.JPG" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img border="0" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEjAEnOAlx3L81IsIB26-ikxaHqS0QS98jKYuoymiW3mSkBRI1EEV7eYEZgEKyBFgE1s5GafncQESRigpdLI1U-Sql2EOMVfO5ADEYW8lUk9KokUoVS6l14I33lgJiFbLufNMSOnfHaFHl4x/s320/physics+pic+5.JPG" wt="true" /></a></div><div style="border-bottom: medium none; border-left: medium none; border-right: medium none; border-top: medium none; clear: both; text-align: center;">This is an example of a series circuit. </div><div class="separator" style="border-bottom: medium none; border-left: medium none; border-right: medium none; border-top: medium none; clear: both; text-align: center;"><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEi-tyGxHYxojs2tZ3MSvNyYAER8rYrfDtEA7wB1Oi46DbRCgYYLGwjouBkeRm08fso0l3_kRl4jhABeavcJXqlxeJFTLIWzdvqcgmbLfmFfCBYROFJqDZ0hGdViu7EPWJuxZ4agamYstZoo/s1600/physics+pic+2.JPG" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img border="0" height="240" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEi-tyGxHYxojs2tZ3MSvNyYAER8rYrfDtEA7wB1Oi46DbRCgYYLGwjouBkeRm08fso0l3_kRl4jhABeavcJXqlxeJFTLIWzdvqcgmbLfmFfCBYROFJqDZ0hGdViu7EPWJuxZ4agamYstZoo/s320/physics+pic+2.JPG" width="320" wt="true" /></a></div><div style="border-bottom: medium none; border-left: medium none; border-right: medium none; border-top: medium none; clear: both; text-align: center;">This is an example of a parallel circuit.</div><div style="border-bottom: medium none; border-left: medium none; border-right: medium none; border-top: medium none; clear: both; text-align: center;"><br />
</div><div class="separator" style="border-bottom: medium none; border-left: medium none; border-right: medium none; border-top: medium none; clear: both; text-align: center;"><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEhCIoW_3OnHGJSE3sPrdM_PWDW9KGT7lPD_DUsJffuX8pVNW0lk24LQApp-tQYJ41bX4qCFX-F1axTTIxn7l1WqjQb9lRcT5PTsuDVxwNtcEq2VNs0wgxa_QRJiYz0WUV80bnzFDz6jZTfX/s1600/physics+pic+4.JPG" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img border="0" height="180" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEhCIoW_3OnHGJSE3sPrdM_PWDW9KGT7lPD_DUsJffuX8pVNW0lk24LQApp-tQYJ41bX4qCFX-F1axTTIxn7l1WqjQb9lRcT5PTsuDVxwNtcEq2VNs0wgxa_QRJiYz0WUV80bnzFDz6jZTfX/s200/physics+pic+4.JPG" width="200" wt="true" /></a></div><div class="separator" style="border-bottom: medium none; border-left: medium none; border-right: medium none; border-top: medium none; clear: both; text-align: center;"><br />
</div><div class="separator" style="border-bottom: medium none; border-left: medium none; border-right: medium none; border-top: medium none; clear: both; text-align: center;">This is an example of a complex circuit</div>kellyemhttp://www.blogger.com/profile/09409770495405049032noreply@blogger.com1tag:blogger.com,1999:blog-6188677960542488060.post-24478971650197304452010-05-03T20:41:00.001-05:002010-05-04T19:21:45.223-05:00Waves and Optics ReflectionI have learned a variety of things in our unit of waves and optics. I learned how to draw ray diagrams (with converging and diverging lenses and mirrors), how to solve problems involving waves, light, sound, lenses, and mirrors, and about light and the human eye. I learned the different types of waves, longitudinal and transverse, and a new letter called lambda. This means wavelength. I learned how to find lengths and speeds of waves along with many other variables. I also learned about the doppler effect and how it pertains to waves and sound. Lastly, I learned about mirrors and lenses. These were fun but a bit difficult for me.<br />
Mirrors and lenses gave me a bit of trouble. I did not catch on to the ray diagrams very quickly, and in turn didn't fully understand many of the problems. I also had trouble with the differences in converging and diverging lenses and mirrors. The switching of signs for real, unreal, upright, virtual, converging, and diverging really threw me off for a little while. Eventually, with practice and a little help from my friends, I began to understand and kept working on it.<br />
I believe that my problem solving skills are pretty good, and have improved tremendously throughout this year. I still struggle with diagrams, especially ray diagrams. I have improved with reading more into equations and finding more out, like if the focal length and radius are negative or positive based on the equation. Physics has been a lot different than my other sciences, and involves a lot of problem solving and working things out. I think I still have some improving to do, but I have come a long way and will only get better.kellyemhttp://www.blogger.com/profile/09409770495405049032noreply@blogger.com1tag:blogger.com,1999:blog-6188677960542488060.post-29100123323711349092010-04-25T20:28:00.003-05:002010-05-04T21:50:55.837-05:00Forces at Work<span class="Apple-style-span" style="font-family: 'Lucida Grande'; font-size: small;"><span class="Apple-style-span" style="font-size: 11px;"></span></span><br />
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<span class="Apple-style-span" style="font-family: 'Lucida Grande'; font-size: small;"><div style="font: 12.0px Helvetica; margin: 0.0px 0.0px 0.0px 0.0px;"></div><div style="font: 12.0px Helvetica; margin: 0.0px 0.0px 0.0px 0.0px;"><span style="letter-spacing: 0px;">This photo is a demonstration of several forces at work in day to day life. The birdhouse is suspended by a rope from a branch on a tree. The rope is the tension force which holds the birdhouse up. A tension force is the force that is usually associated with ropes, wires, and springs. It also counteracts the force of gravity. The acceleration of gravity is equal to 9.8 meters per second squared and always pulls an object towards other objects and always pulls everything down toward the earth. The tension force is opposite the gravity because it is pulling the birdhouse up, while the force of gravity is pulling it down. These two forces equal each other and cancel each other out, therefore the object is at rest and at equilibrium. If the birdhouse was not at equilibrium, it would either be falling or rising. This This birdhouse has many forces acting on it, and is an example of how physics is seen is our daily world. </span></div><div style="font: 12.0px Helvetica; margin: 0.0px 0.0px 0.0px 0.0px;"><br />
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</span>kellyemhttp://www.blogger.com/profile/09409770495405049032noreply@blogger.com1tag:blogger.com,1999:blog-6188677960542488060.post-91847051580823831412010-03-23T18:54:00.001-05:002010-03-23T18:54:06.548-05:00Einstein Quote!!<div style="font: 16.0px Times; margin: 0.0px 0.0px 16.0px 0.0px;"><br />
</div><div style="font: 13.0px Times; margin: 0.0px 0.0px 16.0px 0.0px;"><span style="letter-spacing: 0.0px;">Albert Einstein said, “Its not that I’m so smart, it’s just that I stay with problems longer.” Albert was a genius, and pretty bright. He could work almost any problem, and was almost always right. He was very curious and inquisitive, and always liked to learn whenever he could. He never gave up learning, and never gave up on a problem if he didn’t know how to do it or if he couldn’t find the answer. This was his key to success, not just because he was brilliant, but because he worked so hard and never gave up. His curiosity and persistence made him who he is, and let him find so many answers and new possibilities. While others gave up, Einstein kept working and figured many things out. </span></div>kellyemhttp://www.blogger.com/profile/09409770495405049032noreply@blogger.com1tag:blogger.com,1999:blog-6188677960542488060.post-80407145146920644842010-03-10T23:34:00.002-06:002010-03-21T20:43:06.138-05:00Ice Hockey and Physics!Ice Hockey has a lot of physics involved! Hockey has lots of momentum involved. If you want to learn about hockey, ohysics, and the relation between them look at the glogster and GoAnimate!!<br />
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Click <a href="http://kmcguire.glogster.com/ice-hockey-physics-7297/">HERE</a> to see glogster!<br />
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Click <a href="http://goanimate.com/movie/0u2MI3kmnldM">HERE</a> to see GoAnimate!kellyemhttp://www.blogger.com/profile/09409770495405049032noreply@blogger.com2tag:blogger.com,1999:blog-6188677960542488060.post-10422242631144390132010-02-21T11:05:00.002-06:002010-02-23T16:58:28.187-06:00Energy ReflectionPart A:<br />
This is what i have learned about energy and the conservation of energy. Energy is a conserved, substance- like quantity with the capability to produce change. Energy can be stored in numerous ways: elastic energy, kinetic energy, gravitational potential energy, chemical potential energy, and internal energy (usually friction). Kinetic energy is the energy an object has when it is moving, where gravitational potential energy is when an object is at a height. Energy can also be transformed into heat and sound. Although the energy may be transferred to another type of storage, it is always constant. Energy does not grow(gain more) or lose any of the amount, it just changes form. While learning about energy, we also learned about work. Work is the energy transferred by forces, causing a displacement. This work is just a change in the energy by a force, like a person pushing a box. The work is done by the person pushing.While learning about work we also learned about power. Power is the rate of work, always in watts. I have also learned about Energy Flow Diagrams. These diagrams show the energy and how it is stored at the beginning and the end. The system is also showed in the diagram. Energy Flow Diagrams are all qualitative, so after learning how to do those we learned many equations to solve the problems with quantitative answers.<br />
I believe this unit is fairly difficult. I always confuse equations and forget which ones work best for certain problems. I sometimes have to try a few equations, but am usually able to solve the problem. The Energy Flow Diagrams are very helpful, and help me know which equation to use because I can see which energies I am looking for. When the energy changes form, it can be hard for me to see which form it ends up as. This is becoming easier for me as I do more problems.<br />
I think my problem solving skills could be a little better, but have definitely improved. I am getting better at quickly finding the right equations after looking at the problem. When I see a difficult problem, I now see how I can solve it and try equations until I do. I believe with a little more practice, especially on power and work problems, my problem solving skills will be a lot better.<br />
Part B:<br />
Energy is everywhere in our world. When a car is going to when a car stops, there is a transfer of kinetic energy to internal energy (from friction). When a little boy is pushing a toy around on the floor, there is work (force). When a person jumps off of a cliff to go bungee jumping, the energy transfers from gravitational potential energy to kinetic energy. Energy is everywhere in our world, always there, just changing forms all the time.kellyemhttp://www.blogger.com/profile/09409770495405049032noreply@blogger.com3tag:blogger.com,1999:blog-6188677960542488060.post-78135879755583100882010-02-01T09:36:00.002-06:002010-02-03T08:51:25.565-06:00GLOGSTER!<span style="color: blue; font-size: large;">How do snowboarders move so smoothly?</span><br />
<span style="color: cyan;"><span style="font-family: Georgia, "Times New Roman", serif;">This is a glog that shows how forces and mtion cause snowboards and snowboarders to glide over the snow. It explains the friction and forces at work, and how they apply to the snowboarder. Snowbaords and the snow creatwe little friction, and this exlains how and why.</span> </span><br />
<span style="color: cyan;">click </span><a href="http://kmcguire.glogster.com/physicsofsnowboarding/"><span style="color: cyan;">here</span></a>kellyemhttp://www.blogger.com/profile/09409770495405049032noreply@blogger.com6tag:blogger.com,1999:blog-6188677960542488060.post-16571359893008317572010-01-27T18:37:00.001-06:002010-02-01T19:01:34.104-06:00Reflection: Gravitational forces, Centripetal forces, and Circular motionI learned a lot about circular motion, gravitation, and centripetal force. I learned that uniform circular motion is when the object is moving at a constant speed in a circle. The velocity is found by 2pi(r)/T. T is the period, or the time it takes for the object to complete one full revolution around the perimeter of the circle it is going in. When an object changes direction, it accelerates. So although the object may have a constant speed, it does not have constant velocity (scalar vs. vector!). The velocity is tangential, and the acceleration of the velocity is called centripetal acceleration. This is found by the equation v^2/r. The acceleration is perpendicular to the velocity. The force that keeps the object going in a circle is called centripetal force. This force is found by using mv^2/r. There are also vertical circles. These circles are not much different, accept for at the top you subtract mg and when it is at the bottom you add mg. Universal Gravitation states that the force that pulls all other bodies and causes them to fall exists also between all other bodies. This force pulls down, but also things together. This helps things like the planets stay in orbit.<br />
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What I have found difficult is knowing what equation to use at what time; especially with the gravitational equations. I also find the FBD's difficult to draw, because the forces can be switched around. I also sometimes get confused what the system is. I am still getting the hang of gravitational forces, but i think i am getting better. Practice makes perfect.<br />
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I think that my problem solving skills are pretty good, but could definitely improve. I think that with the more problems that I see, I improve with each one. I sort of freak out when I glance at a problem and it seems too difficult. But when I actually look at it and focus I usually see a way to find the answer. I think my problem solving skills are definitely improving.kellyemhttp://www.blogger.com/profile/09409770495405049032noreply@blogger.com3tag:blogger.com,1999:blog-6188677960542488060.post-74916753387043348492010-01-10T19:26:00.000-06:002010-01-10T19:26:39.501-06:00Newton's Second Law part AI learned how to do many things after learning Newton's second law. Newton's second law states, "for a particular force, the acceleration of an object is proportional to the net force and inversely proportional to the mass of the object." This law links mass, acceleration, and the forces. This can be used with many problems, and even systems. Systems don't usually balance out, and this law helps find the acceleration. This law uses the formula a=∑F/m or ∑F=ma. Using this formula I learned to solve problems with acceleration in them, not just problems at constant speed or at rest. I also found out how to solve systems, including problems using pulleys and Atwood's machines. With these problems I improved my ability to draw FBD's and calculate the sum of the forces. I have also learned how to calculate the friction force acting on an object. The equation for this is Ff= Fn(mu). mu is the coefficient of friction and is used to calculate the frictional force.<br />
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What I have found difficult with this law and these problems is when I do not have much information, and I have to keep working on the problem and it somehow works out in the end. I get a little confused going through the problems without knowing multiple variables. Also, a am not quite a master at finding the mu and friction force, because we just learned about it and it is still fairly new.<br />
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I think my problem solving skills are improving and I am able to catch on to new ideas faster. Although I am not a master at the frictional force equation and problems yet, I am catching on to this idea much faster and already understand it with most problems. I sometimes find certain acceleration problems difficult when not much information is given. I am fairly secure with systems, and can usually find the answers that I am looking for. Overall I think I am getting better at solving problems and can grasp ideas quicker.kellyemhttp://www.blogger.com/profile/09409770495405049032noreply@blogger.com3tag:blogger.com,1999:blog-6188677960542488060.post-11692551533770417192009-12-07T19:11:00.000-06:002009-12-07T19:11:17.737-06:00<span style="font-family: 'Helvetica Neue', Arial, Helvetica, sans-serif;">Part A:</span><br />
<span style="font-family: 'Helvetica Neue', Arial, Helvetica, sans-serif;">This is what i learned about Newton's first law of motion. Newton's first law states that "an object at rest tends to stay at rest and an object in motion tends to stay in motion with the same speed and in the same direction unless acted upon by an unbalanced force." This law pertains to translational equilibrium. This means that the sum of the forces on the x axis and the sum of the forces on the y axis add up to zero. If the object is at rest or at a constant speed than it is at translational equilibrium. This simple knowledge helps to solve many problems, with the help of a little algebra. To solve these problems i learned how to draw free body diagrams (FBDs). These diagrams show all the different forces acting on an object and help me better understand the problem and what it is asking. I have also learned about rotational equilibrium. This has to do with rotations and torque. It adds the sum of the torque forces to the problems. The sum of the torque forces also add up to zero when it is in rotational equilibrium.</span><br />
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<span style="font-family: 'Helvetica Neue', Arial, Helvetica, sans-serif;">What i have found difficult about what we are studying is when the objet is on an inclined plane. This gives me trouble, especially when i have to switch the SIN and COS on theta. Also, the algebra sometimes gives me a little difficulty, especially when i do not take my time. I tend to be over- confident in the algebra, and go way too fast. I make small mistakes which ultimately lead to me getting a totally wrong answer. Last, the rotational equilibrium confuses me greatly. I am still new to this topic, and still do not fully understand the concept. The FBDs are fairly easy but finding the answer is still a bit confusing to me. </span><br />
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<span style="font-family: 'Helvetica Neue', Arial, Helvetica, sans-serif;">My problem solving skills are pretty good i would say. I think they could be a lot better if I would slow down and take problems one step at a time. I think if I would look over my equations before i try to solve problems, that would help me not to confuse them. I also think that if I checked over my work more I could catch small careless mistakes. Also, I believe if I would do a few more problems over the concepts that confuse me more often that i would grasp the overall concept better and be able to solve more problems. Overall, my problem solving skills are pretty good, but i have a few small issues with solving problems sometimes. </span><br />
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<span style="font-family: 'Helvetica Neue', Arial, Helvetica, sans-serif;">Part B:</span><br />
<span style="font-family: 'Helvetica Neue', Arial, Helvetica, sans-serif;">There is a big connection between Newton's first law and everyday life. This law and forces are found everywhere! For example, a bridge over a body of water has to have beams to keep it up. These beams have to be able to withstand so much force, and that can be determined by this law. If the beams could hold up the bridge but not he cars, then the bridge would fall and many people would die. Second, a stoplight i s a great example of tension. The wires holding the light up have to be strong enough to hold up the light and not fall or break. If we did not know how to calculate these things, many bad things could happen. Physics and Newton's first law ( Translational and Rotational equilibriums) help not only architects, scientists, designers, and inventors; but they help everyone!</span><br />
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</span>kellyemhttp://www.blogger.com/profile/09409770495405049032noreply@blogger.com3tag:blogger.com,1999:blog-6188677960542488060.post-21352739671537677352009-11-12T09:12:00.003-06:002009-11-12T09:15:57.481-06:00yay i did it!!kellyemhttp://www.blogger.com/profile/09409770495405049032noreply@blogger.com0tag:blogger.com,1999:blog-6188677960542488060.post-76865907348387666352009-11-11T21:00:00.005-06:002009-11-12T09:16:53.293-06:00<span style="color: #5e5e5e; font-family: Verdana, Arial, sans-serif; font-size: 12px; white-space: pre;">See if you can answer the question!<script language="JavaScript" src="http://vhss-d.oddcast.com/voki_embed_functions.php" type="text/javascript">
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</span>kellyemhttp://www.blogger.com/profile/09409770495405049032noreply@blogger.com0tag:blogger.com,1999:blog-6188677960542488060.post-51840645282539137562009-11-11T20:19:00.003-06:002009-11-12T09:14:35.754-06:00My crossword!<a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEhvgUdEgxNT-CBe8Pj-Cfr0e94znh3_8gymrXSWmg9wfUa_5N1mJBQC9Lq9IWbvVyDDPL7ILMQr8-XwK9vgpG4vlrYCqQwyRfSkogJbMkE8IlB2DHJMRaVRnRdx2DgRg8spkxfwNS9r3jNZ/s1600-h/proctile+crossword.png" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><span style="color: black;">try testing yourself!</span><br />
<img border="0" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEhvgUdEgxNT-CBe8Pj-Cfr0e94znh3_8gymrXSWmg9wfUa_5N1mJBQC9Lq9IWbvVyDDPL7ILMQr8-XwK9vgpG4vlrYCqQwyRfSkogJbMkE8IlB2DHJMRaVRnRdx2DgRg8spkxfwNS9r3jNZ/s320/proctile+crossword.png" /><br />
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<div class="separator" style="clear: both; text-align: center;">Across<br />
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3. if one object is fired directly horizontal while the other is dropped from the same height, they will hit the ground at the ______ time. (neglecting air resistance)<br />
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4. the sign for horizontal velocity<br />
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5. the factor that is always constant<br />
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7. what you use to find the vertical component of the velocity (initial)<br />
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8. the horizontal distance the object travels<br />
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9. gravity causes the vertical component of the velocity to ________.<br />
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10. the sign for initial velocity<br />
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11. the object that is in motion<br />
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12. the component of the velocity that remains constant the whole time<br />
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1. what you use to find the horizontal part of the velocity (initial)<br />
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2. how far off the ground the object is (at a given time or at the peak of its flight)<br />
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4. the component of the velocity that accelerates constantly due to gravity<br />
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6. the sign for vertical velocity<br />
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</span>kellyemhttp://www.blogger.com/profile/09409770495405049032noreply@blogger.com2tag:blogger.com,1999:blog-6188677960542488060.post-71708348141039345152009-11-11T18:02:00.000-06:002009-11-11T18:02:15.211-06:00My new Glogster!!I made a glogster and hope i post this right... Click here to view my<a href="http://kmcguire.glogster.com/projectile-motion/"> horizontal projectile motion glogster</a>.kellyemhttp://www.blogger.com/profile/09409770495405049032noreply@blogger.com2tag:blogger.com,1999:blog-6188677960542488060.post-49046383783320080492009-10-29T09:54:00.002-05:002009-10-29T09:54:21.028-05:00My Voki!<script language="JavaScript" src="http://vhss-d.oddcast.com/voki_embed_functions.php" type="text/javascript">
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