1. if you push a ball and it rolls down a ramp, is it gravitational to kinetic energy?
2. if a ball that is rolling down a ramp hits a wedge that moves and pushes a car, it is kinetic to gravitational energy?

1) It will be potential to kinetic energy. 2) kinetic energy is partly transformed into heat and partly spent in generating elastic waves within the two colliding bodies.

Explanation:

We have to first understand the principle of energy conservation and that it is that energy is transformed from one form to another, from potential energy to kinetics or vice versa. When a body is immobile at a height relative to a reference point it is said that at that height the body has potential energy, as the reference point is taken as a point where all potential energy is zero and has been transformed into kinetic energy

1)

In the moment when the ball is in the highest point of elevation with respecto to the reference point the potential energy will be:

When the ball is in the lowest point the energy is kinetic and it will be defined by:

2)

When the ball is rolling and moving with a velocity and hits a wedge it will be kinetic energy transformed into kinetic energy but with less amount of the initial energy because the lost kinetic energy is partly transformed into heat and partly spent in generating elastic waves within the two colliding bodies.

the device is called “ rocket engine”

where are the vectors ?