Question

Calculate the momentum of a bullet of 25 g when it is fired from a gum with a velocity of 100m/s.

Answer 1

Here's the answer you are looking for

Mass of the bullet = 25g = 0.025kg

Velocity of the bullet = 100m/s

Momentum is mass multiplied to velocity,

so momentum of the bullet is

= 0.025 × 100 kgm/s

=2.5kgm/s (ans.)

Answer 2

Given :

• Mass(m) of bullet is 25 g

• Velocity(V) of bullet is 100m/s

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To find :

• Momentum(P) of bullet

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Formula to be used :

• P=Vm

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Solution :

Let's apply formula for momentum!

⇒ P=Vm

Now substitute given values.

⇒ P=(100m/s)(25g)

Now solving it.

⇒ P=2500 g.m/s

Now converting in SI unit.

⇒ P=2500/1000 kg.m/s

⇒ P=2.5 Kg.m/s

Hence the required momentum of bullet is 2.5 Kg.m/s

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Note→ Here I have divided 2500 g.m/s to convert it into SI unit of momentum.