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As per given figure to complete the circ...

As per given figure to complete the circular loop what should be the radius if initial height is 5 m

A

4 m

B

2 m

C

2.5 m

D

3m

Text Solution

Verified by Experts

The correct Answer is:
B
Applying law of conservation of energy i.e., `P.E.=K.E`.
`rArr mgh = (1)/(2) mv^(2) = (1)/(2) m (sqrt(5 Rg))^2`
`rArr h=(5R)/(2) rArr = (2h)/(5) = (2 xx 5)/(5) = 2 m`.
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