Question

t: 2 WORK AND ENERGY SOR INSTIT If the mass of the body is made three times and the velocity becomes double then the kinetic energy will increase: A) 6 times B) 12 times C) 24 times D) 18 times​

Answer 1

Answer:

12 times

Explanation:

The mass is made three times so new mass m'

m'= 3m

The velocity is doubled ,v' = 2v

so the kinetic energy is KE =

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

so it will become new kinetic energy KE'= 1/2×3m×(2v)²

KE'=1/2×3×4 mv²

KE'= 12× 1/2 ×mv²

KE' = 12 KE

it will increase 12 times