Work Energy And Power Question 142

Question: A particle is moving in the vertical plane. It is attached at one end of a string of length λ whose other end is fixed. The velocity at the lowest point is u . The tension in the string is T and velocity of the particle is v at any position. Then, which of the following quantity will remain constant.

Options:

A) T.v

B) kinetic energy

C) Gravitational potential energy

D) T×v

Show Answer

Answer:

Correct Answer: A

Solution:

[a] The tension vector T is always normal to velocity vector.

Hence T.V is always zero.

(1) is correct choice.



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