Sunday, April 25, 2010

Forces at Work

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.