(adsbygoogle = window.adsbygoogle || []).push({}); 1. The problem statement, all variables and given/known data

A 4.0kg bowling ball rolling to the right at 8.0 m/s has an elastic head-on collision with another 4.0kg ball initially at rest. The first ball stops after the collision.

a) Find the velocity of the canoe after the collision?

b) Is the collision perfectly elastic? (show work)

c) Is energy conserved? (show work)

2. Relevant equations

m_{1}v_{1}+m_{2}v_{2}= m_{1}v_{1}^{'}+ m_{2}v_{2}^{'}

PE=KE

mgh=1/2mv^{2}

3. The attempt at a solution

a) (4.0kg)(8.0m/s) + (4.0kg)(0 m/s) = (4.0kg)(0 m/s) + (4.0kg)(v_{2}')

32 kgm/s + 0 kgm/s = 0 kgm/s + 4.0kg(v_{2}')

8 m/s = v_{2}'

b) Don't know how to tell if it is perfectly elastic, no equation that I can think of

c) Don't know how to tell if energy is conserved, no equation that I can think of

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# Homework Help: Energy Conserved in momentum problem

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