Final answer:
The mass of a person with a momentum of 300 kg·m/s, moving at 5 m/s, must be 60 kg.
Step-by-step explanation:
The question you're asking involves calculating the mass of a person given their momentum and velocity. Momentum is defined as the product of mass and velocity (p = mv), so to find the mass, you would divide the momentum by the velocity. Since you've stated that the person has a momentum of 300 kg·m/s and is moving at 5 m/s, the calculation would be:
mass (m) = momentum (p) / velocity (v)
Substituting the given values into this equation, we get:
mass (m) = 300 kg·m/s / 5 m/s = 60 kg
Thus, the mass of the person must be 60 kg.