Question

a)Find the liner momentum of a runner of mass 65kg running with velocity of 6 m/s b)Find the liner momentum of a lorry of mass 8 tonnes moving with velocity of 81 km/h

Answer 1

The linear momentum is given by the product of the mass and the velocity.

a)

Calculating the momentum with a mass of 65 kg and a velocity of 6 m/s, we have:

$\begin{gathered} p=65\cdot6\\ \\ p=390\text{ kg*m/s} \end{gathered}$

b)

First, let's convert the mass to kg and the velocity to m/s:

$\begin{gathered} 8\text{ ton}=8\cdot1000\text{ kg}=8000\text{ kg}\\ \\ 81\text{ km/h}=\frac{81}{3.6}\text{ m/s}=22.5\text{ m/s} \end{gathered}$

Now, calculating the momentum, we have:

$\begin{gathered} p=8000\cdot22.5\\ \\ p=180000\text{ kg*m/s} \end{gathered}$