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Chapter 6: Q 3DQ (page 1519)

Can an object with constant acceleration reverse its direction of travel? Can it reverse its direction twice? In both cases, explain your reasoning.

Short Answer

Expert verified

An object with constant acceleration can reverse its direction of travel.

There is no possibility to change the direction twice with constant acceleration.

Step by step solution

01

Step 1

Acceleration is the rate by which the velocity wills changes with time with respect to both speed and direction.

02

 Explanation

Acceleration is the only factor concerned with the change in velocity. When the initial velocity of the object is opposite to the direction of acceleration. Then the direction of motion has to be reversed.

Example:Imagine a ball thrown up and it is under the influence of gravity. The direction of motion gets reversed at a maximum height while the acceleration is the same. The acceleration due to gravity is the only acceleration present here.

Any object will change direction at once with acceleration but not the second time. Because as the speed increases acceleration is positive and acceleration is negative when speed decreases.


Example: If an object is moving with constant magnitude and reaches its maximum height, then it will stop a moment and changes the direction of motion.

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