i seem to having trouble with questions related to(adsbygoogle = window.adsbygoogle || []).push({}); elasticcollisions. Please help me out if you can please.

A 0.25 kg ball is attached to a 26-cm piece of string. The ball is first raised so that the string is taut and horizontal, then the ball is released so that, at the bottom of its swing, it undergoes an elastic headon collision with a 0.21 -kg ball that is free to roll along a horizontal table.

What is the speed of the 0.21 kg ball just after the collision?

**Physics Forums | Science Articles, Homework Help, Discussion**

Dismiss Notice

Join Physics Forums Today!

The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

# Homework Help: Conservation momentum in 2D

**Physics Forums | Science Articles, Homework Help, Discussion**