Question

A 76 kg student is walking home from school at a constant acceleration, traveling 15 meters west in 20 seconds. What is the momentum of the student?Show your work

Answer 1

Given data

*The given mass of the student is m = 76 kg

*The given distance is s = 15 m

*The given time is t = 20 s

The speed of the student is calculated as

`\begin{gathered} v=(s)/(t) \\ =(15)/(20) \\ =0.75\text{ m/s} \end{gathered}`

The formula for the momentum of the student is given as

`p=mv`

Substitute the known values in the above expression as

`\begin{gathered} p=(76)(0.75) \\ =57\text{ kg.m/s} \end{gathered}`

Hence, the momentum of the student is p = 57 kg.m/s