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 experiment’s design?(1 point)

Question

Responses

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

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

Answer 1

The most relevant issue with Marcus's experiment design is:

The drops are not repeated.

Repeating the drops would help ensure consistent results and account for variables that could affect the timing, such as wind or minor differences in how the balls are dropped. While the other options touch on relevant aspects of experimental design, the lack of repetition is a fundamental flaw that impacts the reliability of the results.