A 12 kg block (A) is sliding right with a speed of 2.2 m/s collides with a 20 kg block (B) which is travelling left at 3.0 m/s.(adsbygoogle = window.adsbygoogle || []).push({});

After the collision the 12 Kg block is moving left at a speed of 1.6 m/s

a) what is the velocity of the 20 kg block after the collision?

b) The collision lasts for 0.025s, what is the average force experienced by the 12kg block?

For a) i just used:

P = mv

Pa + Pb = Pa' + Pb'

plugged in the numbers and got Vb' = .72 m/s left.

I'm having trouble with part b) .. any ideas on how i could get started?

thanks

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# Homework Help: Collision Problem

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