Question

A 150g bullet is fired from 15 kg gun with a speed of 1500 m/s.What is the speed of the recoil of the gun?
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Answer 1

Answer:

the answer is correct thinking if correct like me

Answer 2

Answer:

The recoil speed of the gun is 15m/s.

Explanation:

• We will solve this question through the concept of conservation of linear momentum as no external force is acting on the system.It is given as,

                                      $\mathrm{P_i=P_f}$       (1)

Where,

$\mathrm{P_i}$=initial momentum

$\mathrm{P_f}$=final momentum

From the question we have,

The mass of the bullet(m)=150g=150×10⁻³kg

The mass of the gun(M)=15 kg

Speed of the bullet(u)=1500m/s

We can also write equation (1) as,

                                $\mathrm{mu=MV}$           (2)

By entering the necessary elements in equation (2), we obtain;$\mathrm{150\times 10^{-3}\times 1500=15\times V}$

$\mathrm{V=15\ m/s}$

Hence, the recoil speed of the gun is 15m/s.

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