Elastic Collision

  • #1

Homework Statement



An object of 2kg moving at 3m/s hits a 4 kg stationary object, causing the stationary object to begin moving at 0.5m/s. How fast is the original object now travelling?

It is an elastic collision.

Homework Equations



Not really sure, 1/2mv^2 I presume.

The Attempt at a Solution



None so far, i'm stuck on it and am not sure how to approach it.
 

Answers and Replies

  • #2
998
15
What principle can be used in a collision?
 
  • #3
Namely, what quantity involves mass and velocity, so we can use all your given data? What can we say about its value before and after the collision?
 

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