Question

a gun of mass 3 kg fires a bullet of mass 30 grams the bullet takes 0.003 s to move through the burial of the gun and acquires a velocity of hundred metre per second calculate the velocity required a velocity of hundred metre calculate the velocity which a gun recoils​

Answer 1

Given:

• Mass of gun = 3kg
• Mass of bullet = 30 g
• Velocity of bullet = 100 m/s

To find:

• Recoil velocity

Solution:

According to the law of conservation of momentum

m × v = m' × v'

Where

• m : mass of gun
• v : ?
• m' : mass of bullet
• v' : velocity of bullet

Converting all the units into the same units

30 g = 0.03 kg

→ 3 × v = 0.03 × 100

→ 3v = 3

→ v = 3/3

→ Recoil velocity = 1 m/s

Hence , recoil velocity = 1 m/s.

#LearnMore !

More formulas

• Momentum = m × v
• Speed = distance/time
• Velocity = displacement/time
• Acceleration = v - u/t = ∆v/t
• Force = m × a
• K.E = 1/2 mv²