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October 23, 2014

October 23, 2014

Posted by **Anonymous** on Thursday, May 10, 2012 at 12:16am.

2. A 10.0 kg object moving to the right with a speed of 4.0 m/s collides and sticks to a 4.0 kg object moving to the left with a speed of 4.0 m/s. How much energy is lost as heat during the collision?

- Physics -
**drwls**, Thursday, May 10, 2012 at 9:22am1. Think about what would happen to total kinetic energy and you will know the answer.

2. Calculate the final velocity Vf using the law of conservation of momentum, which must be obeyed.

10*4 - 4*4 = 14*Vf

14*Vf = 24 kg*m/s

Vf = +1.714 m/s (+ is to the right)

Now compare initial and finalkinetic energies. That is something you should do yourself.

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