Question

Students want to design an experiment to study gravity. They decide they will drop four objects with the same mass from the top of their school’s bleachers. They will time how long each object takes to reach the ground. How can they improve confidence in the experiment’s results?(1 point)
Responses

Drop all four objects at once.
Drop all four objects at once.

Drop each object 10 times and use the average of each object’s fall times.
Drop each object 10 times and use the average of each object’s fall times.

Let a different student time the drop of each object.
Let a different student time the drop of each object.

Randomly select the order in which the objects are dropped.

Answer 1

Drop each object 10 times and use the average of each object’s fall times.

Repeating trials and averaging reduces random error and increases the reliability/confidence of the measured times.