Rocket Man has a propulsion unit strapped to his back. He starts from rest on the ground,

Question:

"Rocket Man" has a propulsion unit strapped to his back. He starts from rest on the ground, fi res 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 136 kg. Find the work done by the force generated by the propulsion unit.