Boxes *A* and *B* are at rest on a horizontal frictionless surface with a compressed spring of negligible mass between them. Box a has mass 2.0 kg and box *B* has 4.0 kg. When the spring is released the two boxes move off in opposite direction and the spring is left behind. After the boxes have moved away from the spring,

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

B) the magnitude of the momentum of *A* is greater than the magnitude of the momentum of *B*

C) the magnitude of the momentum of *A* is equals than the magnitude of the momentum of *B*

D) the kinetic energy of *A* equals the kinetic energy of *B*

Frequently Asked Questions

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 Push-Away Problems With Energy concept. You can view video lessons to learn Push-Away Problems With Energy. Or if you need more Push-Away Problems With Energy practice, you can also practice Push-Away Problems With Energy practice problems.

How long does this problem take to solve?

Our expert Physics tutor, Juan took 2 minutes and 36 seconds to solve this problem. You can follow their steps in the video explanation above.