A block of mass m sits on a ramp without friction. A force F is exerted to stop it from sliding down.
1) Whats the magnitude of F?
2) At a certain time F is withdrawn and m starts to slide down. What is the acceleration of m? How long does it take for m to reach the bottom of the ramp?
3) What is the velocity and kinetic energy at the bottom of the ramp?
4) After it comes down from the ramp, m starts to slide on the horizontal ground. If the coefficient of friction is Meu, how much further can m move?