A bullet is fired from a rifle. The rifle is free to recoil. Compare the kinetic energy of the rifle with that of the bullet .

A bullet is fired from a rifle. The rifle is free to recoil. Compare t

1.	A bullet is fired from a rifle. The rifle is free to recoil. Compare the kinetic energy of the rifle with that of the bullet .
Answer» SOLUTION :`K.E , K =1/2 mv^2 =1/2 ((mv)^2)/(m) =(p^2)/(2m)` [ p=momentum ] Both the rifle and the bullet were at REST before firing . After firing , the momenta of the rifle and the bullet MUST be equal in magnitude and OPPOSITE in direcition in order to conserve linear momentum. As p is thesame for both `Kprop 1/m`. As the rifle is HEAVIER, its K.E is less than that of the bullet.