what is the mechanical advantage of an inclined plane that has a length of 9 feet and a height of 3…

Explanation:

Step1: Recall mechanical - advantage formula

The mechanical advantage (MA) of an inclined plane is given by the formula $MA=\frac{l}{h}$, where $l$ is the length of the inclined plane and $h$ is the height.

Step2: Substitute values

Given $l = 9$ feet and $h=3$ feet. Substitute these values into the formula: $MA=\frac{9}{3}$.

Step3: Calculate the result

$\frac{9}{3}=3$.

Answer:

B. 3