Elastic collision.

two objects, one initially at rest, undergo a one-dimensional elastic collision. if half the kinetic energy of the initially moving object is transferred to the other object, what is the ratio of their masses?

Newtons view of arrangement of the universe

Complete these sentences. if a roller coaster train has a potential energy of 1,500 j and a kinetic energy of 500 j as it starts to travel downhill, its total energy isj. once the roller coaster train gets closer to the bottom of the hill, its kinetic energy increases to 1,100 j, and its potential energy decreases to j. when the train reaches the bottom of the track and is traveling along the ground, its kinetic energy isj.

If a hiker that weighs 600 newtons climbs a 50 meter hill, how much gravitational potential energy has the hiker gained?