A .15 kg ball is dropped from the top of a 150 m building. What is the kinetic energy of the ball when it passes the 16th floor at a height of 63 m?

A250-n box is at rest on a frictionless horizotal floor. then a person shoves the box with a non-zero force of magnitude p. which statement best describes the relationship betweeen p and the motion of the box after it was shoved? -the box will not move when p< 250n but otherwise will accelerate at a constant rate that is directly proportional to p - the box will begin moving at a speed that is directly proportional to p, then will gradually slow to a halt -the box will move with constant velocity at a speed that is directly proportional to p -box will accelerate across the floor at a constant rate that is directly proportional to p

As the distance from a magnet increases, what happens to the magnet force?

An atom that has gained or lost electrons is called an _