Question

A bullet of mass 1 kg if fired with a velocity of u m/s from a gun of mass 10 kg. find the ratio of kinetic energies of bullet and gun.

Answer 1

HEYA...

KINETIC ENERGY OF BULLET=

1/2 M V SQ.

= 1/2 * 1* u

= 1/2 U

INITIAL VELOCITY OF GUN = U


= 1/2 M V SQ.

= 1/2 * 10 * U

= 5 U


THEREFORE RATIO OF THEIR KINETIC ENERGIES =

1
= 1/2U / 5U

= 1/10

THEREFORE RATIO WILL BE 1: 10


HOPE HELPED..

Answer 2

HEYA...

KINETIC ENERGY OF BULLET=

1/2 M V SQ.

= 1/2 * 1* u

= 1/2 U

INITIAL VELOCITY OF GUN = U

= 1/2 M V SQ.

= 1/2 * 10 * U

= 5 U

THEREFORE RATIO OF THEIR KINETIC ENERGIES =

1

= 1/2U / 5U

= 1/10

THEREFORE RATIO WILL BE 1: 10

HOPE HELPED..