Assignment:
A block of weight mg sits on an inclined plane as shown. A force of magnitude F is applied to pull the block up the incline at constant speed. The coefficient of kinetic friction between the plane and the block is Mu.
- What is the total work done on the block by the force of friction as the block moves a distance L up the incline? Express the work done by friction in terms of any or all of the variables Mu, m, g, teta , L and F.
- What is the total work Wf done on the block by the applied force F as the block moves a distance L up the incline? Express your answer in terms of any or all of the variables Mu,m,g,teta,L,F:
Now the applied force is changed so that instead of pulling the block up the incline, the force pulls the block down the incline at a constant speed
- What is the total work Wfriction done on the block by the force of friction as the block moves a distance down the incline?
- What is the total work Wf done on the box by the appled force in this case?