Chapter 9.5, Problem 42AYU

To determine

Tofind:the work done if F is orthogonal to $\overrightarrow{AB}$ .

Answer to Problem 42AYU

  $W=0$ .

Explanation of Solution

Given:

Using the definition of work done in this section.

Calculation:

In case F is orthogonal to $\overrightarrow{AB}$ ,

  $\text{i}\text{.e,}\cos \theta ={90}^{\circ }$

Work is said to be done when an object moves (displaces) along the direction of application of force.

Therefore, work done is

  $\begin{array}{l}W=F\cos \theta \times d\\ W=F\cos 90\times d\\ W=0\end{array}$

Hence, thework done is $W=0$ .