1. It takes a force of 300 N to keep a 500-N box sliding across a floor. What is the coefficient of the sliding friction?
2. A force acting on a 5.0-kg body increases its speed uniformly from 2.0m/s to 8.0m/s in 3 s. What is the initial momentum of the body? What is the final momentum of the body? What is the force acting on it?
3. In order to swing a .1kg mass tied to one end of a cord in a horizontal circle of radius .5 m so that its tangential speed is .2m/s what centripetal force must you exert on the mass through the cord?
4. At what distance from the center of the earth does g = 2.0 m/s x s (s squared)