A machine gun with a mass of 5kg fires a 50g bullet at speed of 100ms^-1. The recoil speed of the machine gun is

OnyemauwaRaymond

6 years ago

Gun momentum = Bullet momentum
Momentum=MV
M1 x V1 = M2 x V2
5 x V1 = 50(convert to kg)50/1000 x100
5 x V1 = 0.05 x 100
5V = 5
Then divide both sides by 5
5V/5 = 5/5
V=1

Em_Rys

8 years ago

Since Gun momentum equals Bullet momentum.
And momentum= MV

Therefore: M1 * V1 = M2 * V2
substituting d values into d eqn.

5 * V1 = 0.05 (converting d 50g to Kg) * 100.
5V = 5 (divide tru by 5)
V = 1ms^1.