Question

if a man has a mass of 74 kilograms runs 800 meters in 150 seconds, what is his average momentum?

Answer 1

The speed of the man

$$v=\frac{d}{t}=\frac{800 \:\rm m}{150\:\rm s}=5.3\:\rm m/s$$

The average momentum of the man

$$p=mv=74\:\rm kg\times 5.3\: m/s=394.7\: kg\cdot m/s$$