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A constant force F = m(2)g//2 is applie...

A constant force `F = m_(2)g//2` is applied on the block of mass nij as shown. The string and the pulley are light and the surface of the table is smooth. Find the acceleration of `m_(1)`

A

`m_(2)` is lifted off the ground at t=20 sec

B

`m_(1)` is lifted off the groudn at t=10 sec

C

work done by tension in the string is `m_(1)` before `m_(2)` is lifted off the groudn is 1250 joule

D

work done by tension in the string of `m_(1)` before `m_(2)` is lifted off the ground is zero

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The correct Answer is:
A, B, C, D
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