Question

A bullet of mass 20 gm is fired from a gun weighing 10 kg. If the initial speed of the bullet is 100 m/s, calculate the speed with which the gun recoils.

Answer 1

Answer:-

• m_1=20g=0.02kg
• m_2=10kg
• u_1=100m/s
• u_2=?

According to law of conservation of linear momentum

$\boxed{\sf \triangle P=P}$

$\\ \sf\longmapsto m_1u_1=m_2u_2$

$\\ \sf\longmapsto 0.02(100)=10u_2$

$\\ \sf\longmapsto 2=10u_2$

$\\ \sf\longmapsto u_2=\dfrac{2}{10}$

$\\ \sf\longmapsto u_2=0.2m/s$

Answer 2

a bullet of mass is fired from a gun if the initial speed of