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Q.

A small block is freely sliding down from top of a smooth inclined plane. The block reaches bottom of inclined plane then the block describes a vertical circle of radius 0.5m along smooth track. The minimum vertical height of inclined plane should be

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a

3m

b

1.25m

c

2.5m

d

1m

answer is B.

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Detailed Solution

Loss of P.E =Gain in K.E ; mgh=12m5rg2

h=5r2=5×0.52=1.25  m

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