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A metallic rod of mass 20kg and of unifo...

A metallic rod of mass `20kg` and of uniform thickness rests against a wall while the lower end of rod is in contact with rough floor. The rod makes an angle `60^@` with floor. If the weight of rod produces a torque `150Nm` about its lower end, the length of rod (`g=10 ms^(-2)`)

A

`1.5 m`

B

`2m`

C

`3m`

D

`4m`

Text Solution

Verified by Experts

The correct Answer is:
C
`tau=mgxxL/2cos60^(@)`
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