A very hard rubber ball (m=0.8 kg) is falling vertically at 8 m/s just before it bounces on the floor. The ball rebounds back at essentially the same speed. If the collision with the floor last 0.05 s, what is the average force exerted by the floor on the ball?

Choose the most likely outcome of this scenario: jen decided to go bike riding without a helmet. while no one is around during her ride, she is thrown from her bike when her wheel goes into a pothole. she is not injured, but she is terrified to get back on her bike. what happens next? a. her physical health is affected even though she wasn't hurt. b. her mental and emotional health are affected because she is afraid to get back on her bike. c. her social health is affected because she is worried her friends saw the fall. d. her overall health is not affected at all by her fall.

A2-kg bowling ball is 2.5 meters off the ground on a post when it falls. just before it reaches the ground, it is traveling 7 m/s. assuming that there is no air resistance, which statement is true?

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