Students are using the experimental setup shown in the image in which the two ends of a string are attached to a car and to a

hanger. The students conduct three trials in which they place metal discs on the hanger to manipulate the force applied to the
car. As a result, the car accelerates along the table while two probes collect motion data.
On the fourth trial of this experiment, a student places some discs on the car by mistake. In 1-2 sentences, explain how this
would this change the acceleration or velocity?

1 answer

Placing additional discs on the car mistakenly increases its mass, which would lead to a decrease in acceleration according to Newton's second law (F = ma), assuming the applied force remains constant. As a result, the car would accelerate more slowly than in the previous trials where only the force from the hanger acted on it.