Question

please tell me answer of this

Answer 1

(Mass of rifle)(Recoil speed of rifle)=(mass of bullet)(speed of bullet)

Solving we get recoil speed of rifle=0.4375 ms^-1

Answer 2

M1= 4 kg

M2=50g= 0.05kg

u1=?

u2= 35m/s

So, According to the conservation of momentum

M1*u1=M2*u2

4*u1=0.05*35

U1=0.05*35/4

U1= 1.75/4

U1= 0.4375m/s.

So, Recoil velocity of rifle is 0.4375m/s