(adsbygoogle = window.adsbygoogle || []).push({}); 1. Kevin has a mass of 87kg and is skating with in-line skates. He sees his 22-kg younger brother up ahead standing on the sidewalk, with his back turned. Coming up from behind, he grabs his brother and rolls off at a speed of 3.4 m/s. Ignoring friction, find Kevin's speed just before he grabbed his brother.

2. VF(ma+mb)=MTVF

3. From the problem I know it is an inelastic collision..

I did v= 87*v+22*2.4/109

v=2.4 which is wrong. the answer is suppose to be3.0

Please help.. I really don't think Ive grasped the idea of collisions

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# Homework Help: Collisions in One Dimension

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