Marcus wants to test the effect of gravity on objects with different masses. He drops two footballs from a first-floor window, a second-floor window, and a third-floor window. In each case, he times how long it takes the footballs to reach the ground. What is wrong with his experimental design?(1 point)

Question

Responses

It does not include objects with different shapes.
It does not include objects with different shapes.

The drops are not repeated.
The drops are not repeated.

The windows are not high enough to show significant differences in the drop times.
The windows are not high enough to show significant differences in the drop times.

It does not include objects with different masses.

Answer 1

The correct response highlighting the flaw in Marcus's experimental design is:

It does not include objects with different masses.

While the experiment involves dropping two footballs, both are likely to have the same mass, which does not allow for a comparison of the effect of gravity on objects with different masses. Thus, the main focus of the experiment—testing the effect of gravity on different masses—is not adequately addressed.