Physics question pls help?

Science & Mathematics by Anonymous 2018-07-06 21:34:35

Social Science

1 answer

A bullet leaves the muzzle of a rifle with a velocity of 4.2 3 102 m/s [fwd]. The rifle barrel is 0.56 m long. The acceleration imparted by the gunpowder gases is uniform as long as the bullet is in the barrel

Anonymous

if acceleration is uniform d = 1/2 a t^2 v = a t then eliminating t on obtain a = v^2 / (2 d) a = 423^2 / (2*0.56) = 159,758 m/s^2