Chapter 10, Problem 2STP

To determine

To Choose: The correct option.

Answer to Problem 2STP

Option C

Explanation of Solution

Given:

Weight of rock, $F_L=300\text{N}$

Effort force, $F_E=100\text{N}$

Formula Used:

Mechanical advantage can be obtained by calculating the ratio of load force and effort force.

  $MA=\frac{F_L}{F_E}$

Calculations:

Substitute the values and solve:

  $\begin{array}{c}MA=\frac{F_L}{F_E}\\ =\frac{\text{300}\text{N}}{\text{100}\text{N}}\\ =3\end{array}$

Conclusion:

Thus, correct option is C.