Question

If we decrease the velocity 5 times the Original one's. What will be the Effect on it's Kinetic Energy ?

Answer 1

Kinetic energy will decrease by 25 times.

Explanation:

Let the velocity be v m/s.

ke=1/2mv^2.

Now, if velocity =v/5m/s, then the new ke=1/2m(v/5)^2=1/2m*(v/25) J.

which implies that ke will reduce by 25 times of the initial ke.*

*ke=kinetic energy.