Question

If the velocity of a body is tripled, then the KE of the body becomes _____ times that of its initial value.

• A. $9$
• B. $4$
• C. $3$
• D. $6$

Answer 1

The correct option is A $9$

Kinetic energy of a body ahving mass m and velocity v is given by $\frac{1}{2}m{v}^2$

This show kinetic energy depends on $v^2$ so if velocity is tripled then kinetic energy will be 9 times.

So best possible answer is option A.