From where is the origin of roller coasters believed to have come from?

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

Most of the volume of an atom is occupied by the

Aplayground slide is 8.80 ft long and makes an angle of 25.0° with the horizontal. a 63.0-kg child, initially at the top, slides all the way down to the bottom of the slide. (a) choosing the bottom of the slide as the reference configuration, what is the system's potential energy when the child is at the top and at the bottom of the slide? what is the change in potential energy as the child slides from the top to the bottom of the slide? (include the sign of the value in your answer.)