Question

when the kinetic energy of a body decreased by 10%.what is the percentage decrease in momentum?

Answer 1

Explanation:

ANSWER

P=mv momentum

And K=

2

1

mv

2

kinetic energy.

Now K=

2m

P

2

If P→0.9P

Then K→ 0.9

2

=0.81

i.e. decreased by 19 percent.

None of the above options is correct.