PHYSICS · Multi-part · CBSE · Physics · Work, Energy and Power · Work, Energy and Power
Problem
A block of mass m is hanging over a smooth, light pulley through a light string. The other end of the string is pulled by a constant force F. The kinetic energy of the block increases by 40 J in 1 s. State whether the following statements are true or false:
(a) The tension in the string is Mg.
(b) The work done by the tension on the block is 40 J.
(c) The tension in the string is F.
(d) The work done by the force of gravity is 40 J in the above 1 s.