Question

From a rifle of mass of 5 Kg, a bullet of mass 100g is fired with initial

velocity 50m/s. Calculate the initial recoil velocity of rifle?​

Answer 1

Answer:

given... mass of bullet m1.. 100 g... 1 kg

... mass of rifle m2.... 5 kg

.. initial velocity of bullet u1... 0

... initial velocity of rifle u2... 0

... final velocity... v1.... 50 m/s

let v2 be recoil velocity of rifle

Step-by-step explanation:

then by law of conservation of momentum

m1u1 +m2u2=m1v1+m2v2

OR

v2=-m1v1/m2

=-1×50/5

v2=10m/s

hope it helps