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A block of mass (= 0.1kg) is hanging ove...

A block of mass (= 0.1kg) is hanging over a frictionless light fixed pulley by an inextensible string of negligible mass. The other end of the string is pulled by a constatn force F in the vertically downward direction. The linear momentum of the block increase by `2kgms^(-1)` in 1s after the block starts from rest. Then, (given `g= 10 ms^(-2)`)

A

The tension in the string is F

B

The tension in the string is 3N

C

The work done by the tension on the block is 20J during this 1s

D

The work done against the force of gravity is 10J

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