The author uses dialogue in this excerpt mainly

Alfred pushes on a heavy box, but cannot move it. the box has a lot of inertia motion friction gravity

If jerome is swinging on a rope and transferring energy from gravitational potential energy to kinetic energy, is being done.

Arocket starts from rest and moves upward from the surface of the earth. for the first 10.0 s of its motion, the vertical acceleration of the rocket is given by ay = 12.80 m/s32t, where the +y-direction is upward. (a) what is the height of the rocket above the surface of the earth at t = 10.0 s? b) what is the speed of the rocket when it is 325 m above the surface of the earth?