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Easy
Question
A block of mass m moving with a velocity v0 on a smooth horizontal surface strikes and compresses a spring of stiffness k till mass comes to rest as shown in the figure. This phenomenon is observed by two observers:
A: standing on the horizontal surface
B: standing on the block
To an observer A, the work done by the normal reaction N between the block and the spring on the block is
- zero
- none of these
The correct answer is:
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