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2. A 4.0 kg block is lowered down a 37 degrees incline a distance of 5.0m from point A to point B. A horizontal force (F = 10N) is applied to the block between A and B as shown in the figure. The kinetic energy of the block at A is 10 J and at B it is 20 J. How much work is done on the block by the force of friction between A and B?
3. THe horizontal surface on which the block slides is frictionless. THe speed of the block before it touches the spring is 6.0 m/s. How fast is the block moving at the instant the spring has been comprised 15 cm?
It provides examples of finding the work done by the force. The solution is detailed and has a '5/5' rating.