Question

34. Kinetic energy of a car, when its speed is
tripled, is increased by the factor
(a) 3
(b) 4
27​

Answer 1

$3$

Answer 2

Answer:

9

Explanation:

Formula for kinetic energy is

$\frac{1}{2} m {v}^{2}$

So if speed is tripled then,

$\frac{1}{2} m {{ ( 3v})}^{2}$

$\frac{1}{2} m 9 {v}^{2}$

So the kinetic energy increases by a factor of 9.

Hope it helps..!!☺