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A body of mass 0.5 kg is whirled in a ve...

A body of mass 0.5 kg is whirled in a verticle circle an angular frequancy of `10 rad //s`.If the radius of the circle is 0.5 m . What is the tension in the string when the body is at the top of the circle? `(Given g= 10 m//s^(2))`

A

10N

B

20 N

C

30 N

D

40 N

Text Solution

Verified by Experts

The correct Answer is:
B
`T =mr omega ^(2)-mg`
`=0.5xx0.5xx100-0.5xx10`
`=25-5`
`20N`
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