Final answer:
The mechanical advantage of an inclined plane Judith is pushing a box up, with a height of 5 meters and a length of 75 meters, is calculated as MA = length of incline / height of incline, which gives a mechanical advantage of 15.
Step-by-step explanation:
The student's question is about calculating the mechanical advantage of an inclined plane. The mechanical advantage (MA) of an inclined plane is the ratio of the length of the plane to the vertical height. It's determined by using the formula MA = length of incline / height of incline.
To find the mechanical advantage for Judith, we take the length of the incline, which is 75 meters, and the height which is 5 meters. Plugging these numbers into the formula gives:
MA = 75m / 5m
MA = 15
Thus, the mechanical advantage of the inclined plane is 15, which is not one of the choices provided. However, if there's a typo in the choices, based on the formula and calculation, the correct value should indeed be 15, indicating that there might have been some error in the multiple-choice options provided.