07:03
University Physics with Modern Physics
A $125-\mathrm{kg}$ (including all the contents) rocket has an engine that produces a constant vertical force (the thrust) of 1720 $\mathrm{N}$ . Inside this rocket, a $15.5-\mathrm{N}$ electrical power supply rests on the floor. (a) Find the acceleration of the rocket, (b) When it has reached an altitude of 120 $\mathrm{m}$ , how hard does the floor push on the power supply? (Hint: Start with a free-body diagram for the power supply.)