Question

During a race, the 48 kg runner accelerates from 5.1 m/s to 8.7 m/s to take the lead. What is the runner's change

in momentum?

Answer 1

Answer: the runner's change in momentum is 172.8 kg·m/s.

Step-by-step explanation:

To find the change in momentum of the runner, we can use the equation:

change in momentum = mass x change in velocity

The mass of the runner is given as 48 kg, and the change in velocity can be calculated as:

change in velocity = final velocity - initial velocity

change in velocity = 8.7 m/s - 5.1 m/s

change in velocity = 3.6 m/s

Therefore, the change in momentum of the runner is:

change in momentum = mass x change in velocity

change in momentum = 48 kg x 3.6 m/s

change in momentum = 172.8 kg·m/s

So the runner's change in momentum is 172.8 kg·m/s.