# A ball with a mass of #9 kg# moving at #14 m/s# hits a still ball with a mass of #18 kg#. If the first ball stops moving, how fast is the second ball moving?

##### 2 Answers

Dec 23, 2015

Dec 23, 2015

#### Explanation:

by *conservation of linear momentum*

9 x 14 + 18 x 0 = 9 x 0 + 18 x

therefore