Normal bounce

Classical Mechanics Level 2

A ball of mass \(m\) is dropped from some height in a (uniform) gravitational field of \(g\). It reaches the ground and bounces directly upward, to 70% of its original height. During the bounce, the ball is in contact with the ground for a small, non-zero time interval of \(\delta t\).

What can be said about the normal force between the ball and ground during the interval \(\delta t?\)

Excel in math and science

Master concepts by solving fun, challenging problems.

It's hard to learn from lectures and videos

Learn more effectively through short, interactive explorations.

Used and loved by over 6 million people

Learn from a vibrant community of students and enthusiasts, including olympiad champions, researchers, and professionals.