Why don’t skateboarders keep flying through the air when they launch off a ramp

Excuse ! extra points plus ! super desperate ! the position of an object does not move relative to a reference point. relative to the reference point the object _. a.) is not moving. b.) is moving.

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

Frank just graduated from eighth grade. assuming exactly four years from now he will graduate from high school how many seconds does he have until his high school graduation