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 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.

The drops are not repeated.

Answer 1

The main flaw in Marcus's experiment design is that he only tests with two footballs, which are identical in shape and mass. Therefore, the most relevant response is:

It does not include objects with different shapes.

This highlights that by using identical items, he may not effectively demonstrate the impact of gravity on objects of varying shapes, though it indeed also does not test with objects of different masses. However, the options given guide towards the importance of shape as a variable in the experiment.