   Chapter 2, Problem 5CQ

Chapter
Section
Textbook Problem

Two cars are moving in the same direction in parallel lanes along a highway. At some instant, car A is traveling faster than car B. Does that mean the acceleration of A is greater than that of B at that instant? (a) Yes. At any instant, a faster object always has a larger acceleration. (b) No. Acceleration only tells how an object’s velocity is changing at some instant.

To determine
The consistency of higher and lower velocities of the cars.

Explanation

Acceleration is the rate of change of velocity. The objects with positive acceleration speed up as time increases.

At some instant, car A is faster than car B. The car can be moving with the same velocity throughout the interval while car B can be increasing its velocity, which is less for an instant compared to car A, through the interval. For car A, constant velocity will have zero acceleration since the acceleration is the rate of change of velocity...

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