A and B are two points 50 meters apart on a straight path inclined at an angle α to the horizontal, where sin α = 0.05, with A above the level of B. A block of mass 16 kg is pulled down the path fro

A and B are two points 50 meters apart on a straight path inclined at an angle

α to the horizontal, where sin α = 0.05, with A above the level of B. A block of mass 16 kg is pulled down the path from A to B. The block starts from rest at A and reaches B with a speed of 10 ms^-1 . The work done by the pulling force acting on the block is 1150 J.

(i)Find the work done against the resistance to motion. ( I was able to solve this just included this for the sake of completeness)

The block is now pulled up the path from B to A. The work done by the pulling force and the work done against the resistance to motion are the same as in the case of the downward motion.

(ii) Show that the speed of the block when it reaches A is the same as its speed when it started at B.

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