A 13.0 kg block is dragged over a rough, horizontal surface by a 88.0 N force...

A 13.0 kg block is dragged over a rough, horizontal surface by a 88.0 N force acting at 20.0° above the horizontal. The block is displaced 4.50 m, and the coefficient of kinetic friction is 0.300.

(a) Find the work done on the block by the 88.0 N force.

(d) What is increase in internal energy of the block-surface system due to friction?

(e) Find the total change in the block's kinetic energy.

Expert Solution

This problem is the application of very basic concepts of work, energy and newton's 2nd law of motion.

The work done by a force is zero if there is no displacement along its direction even if there is some displacement in any other direction.

Detailed solution is given in the image attached below. You can comment down if there is any doubt regarding the solution.

genius_generous answered 2 years ago

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