A 2.90 kg mud ball has a perfectly inelastic collision with a second mud ball that is initially at rest. The composite system moves with a speed equal to one-third the original speed of the 2.90 mud ball. What is the mass of the second mud ball?

Answer 1

You must be having an identity crisis. Five of the six physics questions you posted have different names.

Please use the same name for all of your posts.