Question
A bullet of mass 10 g is fired with a rifle. The bullet takes 0.003 s to move through its barrel and leaves it with a velocity of 300 m/s. What is the force exerted on the bullet by the rifle?
Solution
Here,
Mass of the bullet, m = 10 g = 0.010 kg
Initial velocity of the bullet, u = 0
Velocity of bullet attained, v = 300 m/s
time taken by the bullet to move through the barrel, t = 0.003 s
Therefore,
Force is given by,
