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Q.

A mass tied to a string moves in a vertical circle with a uniform speed of 5 m/s as shown. At the point P, the string breaks. The mass will reach a height above P of nearly ……..

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a

 2.16 m

b

 1 m

c

 0.5 m

d

1.25 m

answer is D.

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Detailed Solution

At P velocity is vertical.

h=v22g=(5)22×9.8

=1.25 m ……nearly

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