A student is running an experiment to determine the relationship between force and acceleration. Given a cart, a track, and 3 mass bars of equal mass, the student uses a spring that can apply varying amounts of force to the cart and a
motion sensor and graphing software to collect acceleration data.
How should the student run this experiment? Circle the letter of your choice.

A.
Run trials with zero added mass, then run trials with increasing mass, until all 3 mass bars are added, increasing
the force as mass is added.

B.
Run trials with zero added mass, then run trials with increasing mass, until all 3 mass bars are added, holding
force constant as mass is added.

C.
Run trials with zero added mass, then run trials with all mass bars added, increasing the force as mass is added.

D.
Run trials with any constant mass, increasing force as more trials are collected.