# Problem: Blocks A and B are initially at rest on a horizontal frictionless surface with a spring of negligible mass compressed between them. Block A has mass 5.0 kg and block B has mass 20.0 kg. The spring is released and the blocks move off in opposite directions. After the blocks, have moved away from the spring. A) the magnitude of the momentum of block A is the same as the magnitude of the momentum of block B  B) the magnitude of the momentum of block A is less than the magnitude of the momentum of block B  C) the magnitude of the momentum of block A is greater than the magnitude of the momentum of block B

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###### Problem Details

Blocks A and B are initially at rest on a horizontal frictionless surface with a spring of negligible mass compressed between them. Block A has mass 5.0 kg and block B has mass 20.0 kg. The spring is released and the blocks move off in opposite directions. After the blocks, have moved away from the spring.

A) the magnitude of the momentum of block A is the same as the magnitude of the momentum of block B

B) the magnitude of the momentum of block A is less than the magnitude of the momentum of block B

C) the magnitude of the momentum of block A is greater than the magnitude of the momentum of block B

What scientific concept do you need to know in order to solve this problem?

Our tutors have indicated that to solve this problem you will need to apply the Types of Collisions concept. You can view video lessons to learn Types of Collisions Or if you need more Types of Collisions practice, you can also practice Types of Collisions practice problems .

How long does this problem take to solve?

Our expert Physics tutor, Jeffery took 1 minute to solve this problem. You can follow their steps in the video explanation above.