Question

If mass of a body becomes half then what will be its K. E​

Answer 1

Let KE=

2

1

mv

2

Given m

1

=

2

1

m

V

1

=2V

KE

1

=

2

1

m

1

(V

1

)

2

=

2

1

×

2

1

m×(2V)

2

=

2

1

(2)mv

2

=2KE

∴ KE is doubled.