Question

The kinetic energy of a body becomes four times its initial value. The new linear momentum will be

(a)same as initial value

(b)four times the initial value

(c)twice the initial value

(d)eight times the initial value

Sorry for posting this question in the wrong section but i did not have any option as i this question was not getting response in the 'academics' section..



kjj

Please write all the steps and dont just write the ans :-)

Answer 1

Kineticenergy=12mv2

⟹v=2KEm−−−−√

Now, if kinetic energy increases to four times then from Kineticenergy=12mv2 it is evident that velocity should be found increased by two times

Again, Momentum=mv

So change in momentum will be increased two times.