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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 2m

C

Power developed by this force varies linearly with displacement

D

Power developed by this force varies parabolically with displacement

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PHYSICS GALAXY - ASHISH ARORA-WORK, ENERGY AND POWER-MCQ
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