A 10-kilogram block is pushed along a rough horizontal surface by a constant horizontal force F as shown. At time t = 0, the velocity v of the block is 6.0 meters per second in the same direction as the force. The coefficient of sliding friction is 0.2. Assume g = 10 meters per second squared.
a. Calculate the force F necessary to keep the velocity constant.
The force is now changed to a larger constant value F'. The block accelerates so that its kinetic energy increases by 60 joules while it slides a distance of 4.0 meters.
b. Calculate the force F'.
c. Calculate the acceleration of the block.
