I need help!!! Ok, so here's the problem. A 10-kilogram block is pushed along a rough horizontal surface by a constant horizontal force F as shown above. 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. Ok, so far I have that the work done by kinetic energy is 1/2mv^2 by which would be simplified to 180 Joules. Since there is friction involved, I would account for the Force of friction which is the coefficient of friction multiplied by the normal force in which the total would be 2. Now would the force F be 180 Joules to keep it constant? and for B since the kinetic energy is increased by 60 Joules, then the total kinetic energy put on the object would be 240 Joules. So would that be force F'? and for the acceleration of the block, would I use V^2= Vo^2 + 2a(deltax)?