Chapter 10, Problem 4STP

To determine

To Choose: The correct option.

Answer to Problem 4STP

C. $5.0$

Explanation of Solution

Given:

The weight of the block, $F=20.0\text{N}$

The distance by which the opposite end of the rope is pulled, $d_e=2.00\text{m}$

The distance by which the block is raised, $d_r=0.40\text{m}$

Formula used:

The idea mechanical advantage is the ratio of the distances moved,

  $IMA=\frac{d_e}{d_r}$

Where $d_e$ is the displacement by the effort force, and $d_r$ is the displacement of the load.

Calculation:

Using the given values in above formula, the ideal mechanical advantage of the pulley system will be,

  $\begin{array}{c}IMA=\frac{2.00}{0.40}\\ =5\end{array}$

Conclusion:

Thus, the ideal mechanical advantage of the pulley system is $5.0$ .