A 125-kg (including all the contents) rocket bas an engine that produces a constant vertical force (the

Question:

A 125-kg (including all the contents) rocket bas an engine that produces a constant vertical force (the thrust) of 1720 N. Inside this rocket, a 15.5-N electrical power supply rests on the floor.
(a) Find the acceleration of the rocket.
(b) When it has reached an altitude of 120 In, how bard does the Hour push on the power supply? (Hint: Start with a free-body diagram for the power supply.)