Question

if the speed of the body is halved,what is the change in its kinetic energy?

Answer 1

therefore it becomes four times the intail ke

Answer 2

Answer:

Kinetic energy of the body K.E=

2

1

mv

2

So, K.E∝v

2

If speed of the body is halved, its kinetic energy will be reduced by a factor of 4.

That is

New K.E=

2

1

m(

2

v

)

2

=

4