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A string can withstand a tention of 25 N...

A string can withstand a tention of 25 N. What is the greatest speed at which a body of mass 1 kg can be whiled in a horizontal circle using 1 m lengt of the string?

A

`2.5m//s`

B

`5m//s`

C

`7.5m//s`

D

`10 m//s`

Text Solution

Verified by Experts

The correct Answer is:
B
`F=(mv^(2))/(r)`
`thereforev^(2)=(Fr)/(m)=(25xx1)/(1)`
`v^(2)=25`
`v=sqrt25=5m//s`.
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