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Figure shows a smooth track, a part of w...

Figure shows a smooth track, a part of which is a circle of radius `r`. A block of mass `m` is pushed against a spring of spring constant `k` fixed at the left end and is then released. Find the initial compression of the spring so that the block presses the track with a force `mg` when it reaches the point P, where the radius of the track is horizontal.

A

`sqrt((3mgR)/(k))`

B

`sqrt((mgR)/(k))`

C

`sqrt((2mgR)/(k))`

D

None

Text Solution

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The correct Answer is:
A
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