"Rocket Man" has a propulsion unit strapped to his back. He starts from rest on the ground, fires the unit, and accelerates straight upward. At a height of 16 m, his speed is 5.0 m/s. His mass, including the propulsion unit, has the approximately constant value of 143 kg. Find the work done by the force generated by the propulsion unit.

Answer 1

work= final KE + final PE
= 1/2 m v^2+ mgh

Answer 2

20376.6