Acoin mass 0.005 kg is dropped from a height of 3 m. how much mechanical energy does it have right before it hits the ground ?

Dalton’s model of an atom is the best described as a) a solar system b) a solid sphere c) a cloud d) a scoop of chocolate chip ice cream

After a big snowfall, you take your favorite rocket-powered sled out to a wide field. the field is 195 m across, and you know that your sled accelerates at a rate of 3.65 m/s2 when the rocket is on. how much time will it take the sled to cross the field starting from rest, assuming the rocket is on the whole time?

Why is the energy that results from a roller coaster's position at the top of a hill referred to as potential energy?