A student designs a gravity experiment. She will time how long it takes different objects to fall from her school’s roof to the ground. She will use three objects: a 2-foot-long board, a toy car, and a paper bag. What is wrong with her experiment’s design?(1 point)

Question

Responses

Gravity will not affect how long it takes for the objects to fall to the ground.
Gravity will not affect how long it takes for the objects to fall to the ground.

The objects do not have the same size, shape, or mass, so any differences in drop times cannot be attributed to one variable.
The objects do not have the same size, shape, or mass, so any differences in drop times cannot be attributed to one variable.

The experiment does not test enough objects.
The experiment does not test enough objects.

The school roof is not tall enough to test the effect of gravity on different objects.

Answer 1

The correct response indicating what is wrong with the experiment's design is:

The objects do not have the same size, shape, or mass, so any differences in drop times cannot be attributed to one variable.

This is because the different physical characteristics of the objects can affect their fall times (e.g., air resistance). To properly test the effect of gravity, the objects should ideally be similar in shape and size to ensure that any differences in drop times are due primarily to gravity and not other factors.