Q.

A block of mass m is released from rest at point A. The compression in spring (force constant k) when the speed of block is maximum is found to be nmgcos⁡θ4k. What should be the value of n?

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answer is 4.

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Detailed Solution

Speed of block will be maximum whenmgcos⁡θ=kx⇒x=mgcos⁡θKWhere x is compression. So n = 4
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A block of mass m is released from rest at point A. The compression in spring (force constant k) when the speed of block is maximum is found to be nmgcos⁡θ4k. What should be the value of n?