Question

Calculate the mass of a bullet, fired from a pistol, moving at a speed of 900 m/s, that has a momentum of 7 kg m/s.

Answer 1

The formula for calculating momentum is expressed as

momentum = mass x velocity

From the information given,

velocity = 900

momentum = 7

Thus,

7 = mass x 900

mass = 7/900 = 0.0078 kg

We would convert it to gram by multiplying by 1000

Thus,

mass = 0.00778 x 1000

mass = 7.78 g