A bullet has a momentum of 3.2 kg*m/s. What is its mass if it is traveling at 762 m/s

Momentum is the product of the mass of a given body and its velocity therefore a body at rest has zero momentum.

Mathematically; momentum = velocity (in m/s) * mass (in kilograms)

therefore, reversing the formula:

mass will be given by the momentum divided by the velocity of the body

thus;

3.2 kg*m/s : 762 m/s = 0.0041995 kg

which is approximately 0.0042 kg (4 decimal places) or 4.2 grams (1000 g =

1 kg).