Question

if a kinetic energy of a body is increased 3 times what was the velocity of the object inicialy​

Answer 1

$→ KE= \frac{1}{2} mv²$

• When kinetic energy of a body is increased 3 times :

$→ KE= \frac{1}{2} m(3v)²$

$→ \frac{1}{2} m \: 9v²$

$→ \frac{KE}{newKE} = \frac{1}{9}$

• So, KE becomes nine times.