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Third Law of Motion

A gun fires 1...

Question

A gun fires 10 bullets/sec each of mass 10 gm, with a muzzle velocity of $50 \frac{m}{s}$ . Find the force required to hold the gun in position.

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Solution

Force required to hold the gun is equal to the reaction force of the bullets coming out on the gun.

$F = \frac{Δ p}{Δ t}$

$F = \frac{n m (v - u)}{t} = \frac{10 \times 10 \times 10^{- 3} (50 - 0)}{1} = 5 N$

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