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When a stick is released (as shown in fi...

When a stick is released (as shown in fig.). Its free end velocity when it strikes the ground is

A

4.2 m/s

B

1.4 m/s

C

2.8 m/s

D

`sqrt(6)` m/s

Text Solution

Verified by Experts

The correct Answer is:
A
The centre of mass of the stick fall through 0.3 m. According to law of conservation of energy
`1/2Iomega^2=mgh`
`1/2 (ml^2)/(3)V^2/l^2=mgh " " (because v=omegal)`
here h =l/2=0.3m
`V=sqrt(6gh)=sqrt(6xx9.8xx0.3) = 4.2m//s`
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