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A solid sphere of mass 1 kg, redius 10 c...

A solid sphere of mass 1 kg, redius 10 cm rolls down an inclined plane of height 7m. The velocity of its centre as it reaches the ground level is

A

`7m//s`

B

`10m//s`

C

`15m//s`

D

`20m//s`

Text Solution

Verified by Experts

The correct Answer is:
B
`v=sqrt((2gh)/(1+(K^(2))/(R^(2))))=sqrt((2xx10xx7)/(1+(2)/(5)))=10m//s`.
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