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A block of mass m is suspended by a ligh...

A block of mass m is suspended by a light thread from an elevator. The elevator is accelerating upward with uniform acceleration a. The work done by tension on the block during t seconds is (u = 0)

A

`m/2(g+a)at^2`

B

`m/2(g-a)at^2`

C

`m/2gat^2`

D

0

Text Solution

Verified by Experts

The correct Answer is:
A
`T=mg+ma,S=1/2at^2`
`W_r=TxxS`
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