A student wants to know if the effect of gravity is the same on all objects. She follows these steps.

Question

1. Drop 5 gram ball, a 10 gram ball, and a 12 gram balm from the height of 10 meters.
2. Record how long it takes for each object to hit the ground.
3. ?

Which step should be next?

A. Measure the mass of the balls again.
B. Perform a second trial.
C. Drop the balls from a different height.
D. Choose new balls.

Answer 1

B. Perform a second trial.