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Chapter 1: Q.4 (page 28)

Does the object represented in FIGURE Q1.4 have

a positive or negative value of ax? Explain.

Short Answer

Expert verified

Acceleration is defined as the rate of change of velocity with respect to time.

Step by step solution

01

Given :

The velocity vector is increasing gradually as it moves towards the right.

A quantity is a vector quantity if it possesses both magnitude and direction.

02

Answer:

  • The object will accelerate if the magnitude of the velocity, speed, changes or the direction changes.
  • From the figure, one can observe that the velocity vector is getting longer , therefore, the object is speeding up as it travels towards left.
  • As per convention, the sign of the velocity is negative.
  • Since acceleration is the rate of change of velocity, its direction will be the same as the direction of velocity.
  • Therefore, the object has negative ax.

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