A car by itself is capable of a certain maximum acceleration. When it tows a twice-as-massive car, its maximum acceleration is
A)one half.
B)one third.
C)one fourth.
D)the same.
E)none of these

Question

Quizplus · Accepted Answer

The maximum acceleration a car can achieve is inversely proportional to the total mass it has to move. When the car tows another car twice its mass, the total mass becomes three times the original, thus reducing its maximum acceleration to one third.

A Car by Itself Is Capable of a Certain Maximum