Chapter 2.2, Problem 20R

To determine

To calculate: the momentum of a 100 kg football player.

Answer to Problem 20R

The momentum of the football along the north is $\boxed{p=400\text{kg}\cdot \text{m/s}}$ .

Explanation of Solution

Given:

Mass of the football player is $m=100\text{kg}$ .

The speed of the player is $4\text{m/s}$ .

Formula used:

The equation for the momentum of the car can be expressed as

  $p=mv$....................(1)

Here, $v$ and $m$ are speed and mass.

Calculation:

Substitute $100\text{kg}$ for $m$ and $4\text{m/s}$ for $v$ in equation (1)

  $\begin{array}{l}p=\left(100\text{kg}\right)\times \left(4\text{m/s}\right)\\ \boxed{p=400\text{kg}\cdot \text{m/s}}\end{array}$

Conclusion:

Hence, the momentum of the football along the north is $\boxed{p=400\text{kg}\cdot \text{m/s}}$ .