Use the image to answer the question below.

In the experimental setup shown, a car has one end of a string attached to it, and the other end is attached to a fixed number of metal discs. The car moves along the table and two probes sense the motion of the car. The probes send information to a computer that displays the acceleration and velocity of the experiment. When looking at these results, which quantity stays constant during the trials?



A car at the one end of the table is tied to a hanger at the other end of the table using a string and a pully. The hanger is hanging over the side of the table while the car is placed flat on the surface of the table. The hanger can support the metal discs. A ruler, a laptop, and other equipment are also placed on the table.


(1 point)
Responses

acceleration
acceleration

velocity
velocity

mass
mass

force

1 answer

In the described experimental setup, the quantity that stays constant during the trials is mass. The mass of the metal discs (the load) being pulled by the car remains unchanged throughout the experiments. While the acceleration and velocity may vary depending on factors such as the frictional force or tension in the string, the mass of the discs does not change. Therefore, the correct answer is mass.