Question

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

Answer 1

Answer: $394.66 \frac{kg m}{s}$

Explanation:

Linear momentum $p$ is expressed as:

$p=mV$

Where:

$m=74 kg$ is the mass of the man

$V=\frac{d}{t}$ is the velocity of the man, which can be calculated if we know the distance he has run $d=800 m$ and the time it took to him to travel that distance $t=150 s$

Hence: $V=\frac{800 m}{150 s}=5.33 m/s$

Solving for the momentum:

$p=(74 kg)(5.33 m/s)$

$p=394.66 \frac{kg.m}{s}$