Which of the following is true when an object of mass m moving on a horizontal f

Question

Which of the following is true when an object of mass m moving on a horizontal frictionless surface hits and sticks to an object of mass M > m, which is initially at rest on the surface?
The collision is elastic.

All of the initial kinetic energy of the less-massive object is lost.

The momentum of the objects that are stuck together has a smaller magnitude than the initial momentum of the less massive object.

The speed of the objects that are stuck together will be less than the initial speed of the less-massive object.

The direction of motion of the objects that are stuck together depends on whether the hit is a head on collision.

Explanation / Answer

The speed of the objects that are stuck together will be less than the initial speed of the less-massive object.

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