A shot-putter puts a shot (weight = 71.1 Newton) that leaves his hand at a distance of 1.52 meter above the ground.
(a) Determine the work done by the gravitational force when the shot has risen to a height of 2.13 meter above the ground. Include the correct sign for the work.
(b) Compute the change (ΔPE=PEf -PE0) in the gravitational potential energy of the shot.