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A collision of two objects occurs in an ...

A collision of two objects occurs in an inertial frame of reference A. It is also observed by an observed in another inertial frame of reference B moving uniformly with respect to the frame A along the z-axis. Which one of the following is correct?

A

The momentum is conserved in both the frames but the energy may not.

B

The energy is conserved in both the frames but the momentum may no .

C

Momentum along the z-axis only is conserved in the two frames.

D

Both energy and momentum are conserved in the both the frames.

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