Question

Q.21 a shell of mass 200 g is fired from a gun of mass 4 kg, which generates total kinetic energy of 1.05 kj. The initial velocity of shell is

Answer 1

Answer:

HELLO DEAR ❤

IF (v) & (V) REPRESENT THE INITIAL VELOCITY OF THE SHELL OF MASS (m) AND THE RECOIL VELOCITY OF GUN OF MASS (M) RESPECTIVELY...

♡ mv + MV = 0

FROM WHICH

V = -(m/M)v

= -(0.2/4)v

= - v/20 m/s

THE NEGATIVE SIGN SHOWS THAT THE RECOIL VELOCITY OF THE GUN IS OPPOSITE TO THE VELOCITY OF SHELL...

THE ENERGY OF EXPLOSION IS USED TO IMPART KINETIC ENERGY TO THE SHELL & TO THE GUN ..

1/2 ( mv² + MV² )

1.05 x 103

THIS GIVES , v2 = 104

SO V = 100 m/s

HOPE IT HELPS !!!

HVE A SWEET DAY ^_^