Question

For the same kinetic energy of a body, what should be the change in its velocity, if its mass
become four times.​

Answer 1

Answer:

What change should be affected in the velocity of the body to maintain same kinetic energy if its mass is increased four times ? Solution : Since Ek=12mυ2, the velocity should be reduced to half its previous value to have to have the saem kinetic energy when mass is increased to four times.

Answer 2

Answer:

It should become half of initial

Explanation:

When KE is constant then

${v}^{2} directly \: proportional \: \: to \: \frac{1}{m}$

So for 4 times mass

v^2 = 1/4

=> v = 1/2