A 12.5 kg box slides down a ramp that is inclined at 20.0° above the horizontal. If the coefficient of kinetic friction between the box and the ramp is 0.120 then what is the acceleration of the box as it slides down the ramp? Include a force (or free-body) diagram of

A box is sitting at rest of the box weighs 20 N .What is the normal force acting on the box ? (Assume Net force is 0 since it is at rest )

An American football lineman reasons that it is senselessto try to out-push the opposing player, since no matterhow hard he pushes he will experience an equal andopposite force from the other player. Use Newton’s lawsand draw a free-body diagram of an appropriate systemto explain how he can still out-push the opposition if he isstrong enough.

A 95kg paratrooper is falling at a terminal velocity, a)Draw a free body diagram of the paratrooper showing all of the forces involved b) what is the upward force of air resistance on the paratrooper while at terminal velocity?