A puck moves across a level, frictionless table and hits a disk that is initiall

Question

A puck moves across a level, frictionless table and hits a disk that is initially at rest. The puck moves with initial velocity and does not spin; the puck sticks to the disk. In the space provided, draw an arrow to indicate the direction of motion of the center of mass of the puck-disk system before the collision. Explain. In the space provided, draw an arrow to indicate the direction of motion of the center of mass of the puck-disk system after the collision. Explain.

Explanation / Answer

as only puck is moving initially, the velocity of center of mass is also in the same direction. so direction would be --------> now after collision also direction will remain same because there are no external forces acting on the system. so velocity of COM remains the same.... so the final direction also would be --------->

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