Question

From a rifle of mass 4 kg, a bullet
of mass 50 g is fired with an
initial velocity of 35 ms
Calculate the initial recoil velocity
of the rifle​

Answer 1

Explanation:

Given : -

• M = 4 kg             

• m  = 50 gms = 50 / 1000 kg

• v  = 35 m/sec

To Find : -

• Calculate the initial recoil velocity of the rifle

Solution : -

As per the conservation of linear momentum,

We Have :

0 = M × (-V) +  mv 

✪ Substitute all values : ✪

➻ 0 = 4 × ( - v ) + 50/1000 × 35

➻ 0 = 4 × ( - v ) + 5/100 × 35

➻ 0 = 4 × ( - v ) 35/ 100

 

➻ V =  - 0.4375