February 20, 2017

Homework Help: Physics

Posted by Alex on Thursday, May 22, 2008 at 8:04pm.

A perfectly (non-head on) elastic collision occurs between a 0.25kg object moving east at 4m/s and a stationary 0.3kg object. Following the collision the 0.25kg object is moving at 2m/s.

a) What is the speed of the 0.3kg object after the collision?
I did:
What formula do you use?

I used m1v1^2 = m1v1'^2 + m2v2'^2
and got 3.16m/s but I'm not sure if that's right.

b) You must select suitable directions of motion for the 2 objects after this collision, which is not head-on. Calculate the direction of motion for one of the 2 objects after the collision.

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