Question

Choose the correct option and explain:

If the velocity of a moving car is reduced to half its original velocity, it's kinetic energy would

(A) Become four times
(B) Become two times
(C) Become on fourth
(D) Become half​

Answer 1

$\huge{\bold{\star{\fcolorbox{black}{red}{Answer}}}}$

(C) Become one fourth

Kinetic energy is directly proportional to velocity squared $( \:K.E. \:= \:\frac{1}{2} \:mv^{2} \:).$ So, if velocity is halved then kinetic energy becomes one-fourth.