Work Energy And Power Question 143

Question: The kinetic energy of a particle moving along a straight line increases uniformly with respect to the distance travelled by it. The force acting on the particle is ( v is the speed of particle at any time)

Options:

A) constant

B) proportional to v

C) proportional to v2

D) inversely proportional to v

Show Answer

Answer:

Correct Answer: A

Solution:

[a] KExKE=Cx12mv2

 =Cx12m2vdvdt=Cdxdtmvdvdt=Cv

mdvdt=Cma=C

F=Cconstant



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