Chapter 4.1, Problem 10PP

To determine

The force with which K’s mother should pull her.

Answer to Problem 10PP

  $21.76\text{N}$

Explanation of Solution

Given:

Mass of the K is $m=27.2\text{ kg}$

Acceleration needed is $a=0.80{\text{m/s}}^{\text{2}}$ .

Formula used:

From Newton’s Second law of motion:

  $F_{net}=ma$

Where, a is the acceleration, m is the mass and $F_{net}$ is the net force.

Calculation:

Substitute the values and solve:

  $\begin{array}{c}{F}_{net}=ma\\ =27.2\times 0.80\\ =21.76\text{N}\end{array}$

Conclusion:

Thus, the required net force is $21.76\text{N}$ .