Question

A bullet of mass 20 gram is fired horizontally with a velocity 100 M per second from a pistol of mass 1.5 kg calculate the recoil velocity of the pistol

Answer 1

here , m1 = 20g =0.02kg
m2= 1.5kg
v2= ?
v1= 100m/s
so,. we know,
m1u1+m2u2= m1v1+m2v2
m1×0+m2×0 = 0.02×100+1.5×v2
v2= -2/1.5= -1.33m/s
this is your answer

Answer 2

here , m1 = 20g =0.02kg

m2= 1.5kg  

v2= ?

v1= 100m/s

so,. we know,

m1u1+m2u2= m1v1+m2v2

m1×0+m2×0 = 0.02×100+1.5×v2

v2= -2/1.5= -1.33m/s