Question

A rough inclined plane is placed on a cart moving with a constant velocity u on horizontal ground. A block of mass M rests on the incline. Is any work done by force of friction between the block and incline? Is there then a dissipation of energy ​

Answer 1

Answer:

As block is at rest on inclined plane as shown in figure.

∴f=Mgsinθ

force of friction on body is due to the tendency of block M to slide Mgsinθ down over the inclined plane. As there is no displacement in block so work done by f and block is zero. As there is no work, so no dissipation of energy takes place.

solution