Question

if the m is 1/2m and the velocity is 2v then what is the kinetic energy.​

Answer 1

Answer:

The energy possessed by a body because of its motion, equal to one half the mass of the body times the square of its speed is called its kinetic energy.

K=

2

1

mv

2

When, v=2v,

K

′

=

2

1

m(2v)

2

K

′

=4×

2

1

mv

2

K

′

=4K

Hence, when velocity is doubled, kinetic energy becomes 4 times.