Question

(about as class 9th science book lesson 9 ) From a rifle of mass 50g is fired with an initial velocity of 35m/s. Calculate the initial reevil velocity of the rifle ?​ ​

Answer 1

Answer:  You didnt mentioned mass of gun but the answer from 9th class

Explanation:Mass of gun M =4 kg Mass of bullet m= 50g                             =50*10^-3 Initial velocity of bullet, v= 35 m/s Let recoil velocity of the gun be m/s Before firing the bullet both gun and bullet were in rest so total momentum of gun and bullet is zero. After firing Momentum of bullet=mv Momentum of gun=Mv Total momentum of bullet and gun after firing = mv+Mv Since, there is no external force applied on the system.  So, total momentum after firing= total momentum before firing mv+Mv=0 Mv = - mv V = - mv/M      =50*10^-3*35/4      =-0.44 m/s

Answer 2

Answer:

I will send you the answer

Explanation:

From a rifle of mass 50g is fired with an initial velocity of 35m/s. Calculate the initial reevil velocity of the rifle