A block of mass M is hanging over a smooth and light pulley through a light string. The other end of the strinig is pulled by a constant force F. The kinetic energy of the block increases by 20J n 1s.A. the tension in the string is MgB. The tension is the string is FC. The work done by the tension on the block is 20 J in the above 1s.D. the work done by the force of gravity is -20J in the above 1s.

A block of mass M is hanging over a smooth and light pulley through a

1.	A block of mass M is hanging over a smooth and light pulley through a light string. The other end of the strinig is pulled by a constant force F. The kinetic energy of the block increases by 20J n 1s.A. the tension in the string is MgB. The tension is the string is FC. The work done by the tension on the block is 20 J in the above 1s.D. the work done by the force of gravity is -20J in the above 1s.
Answer» Correct Answer - B

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