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A block of mass 2 kg is hanging over a s...

A block of mass 2 kg is hanging over a smooth and light pulley through a light string. The other end of the string is pulled by a constant force F = 40 N. The kinetic energy of the particle increases 40 J in a given interval of time. Then, `(g = 10 m//s^(2))`

A

tension in the string is 40 N

B

displacement of the block in the given interval of time is 2 m

C

work done by gravity is `-20 J`

D

work done by tension is 80 J

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DC PANDEY-WORK, POWER AND ENERGY-B More than One Option is Correct
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