Question

If mass gets doubled & velocity becomes half then what will be the change in Kinetic Energy.

Answer 1

Explanation:

kinetic energy = 1/2mv2 ----(1)

mass doubled velocity halved

kinetic energy = 1/2 2m(1/2v)2

= mv2/4 ---(2)

so by comparing we get

kinetic energy get halved

Answer 2

Answer:

the kinetic energy will get halfed

Explanation:

we can take inital kinetic energy as.....

$e = \frac{1}{2} m {v}^{2}$

and after the change in mass and velocity.... we can defined it as......

$j = \frac{1}{2} 2m { (\frac{v}{2}) }^{2}$

here....

$j =2 \times \frac{1}{4} \times \frac{1}{2} m \times {v}^{2}$

substituting the the value of e in the equation.....

$j = \frac{1}{2} e$

so the final kinetic energy is half of that initial energy.

I am done.