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Chapter 2: Q14. (page 41)

Can an object have zero acceleration and non-zero velocity at the same time? Give examples.

Short Answer

Expert verified

Yes, an object can have zero velocity and still be accelerating.

Step by step solution

01

Step 1. Definitions of velocity and acceleration

Velocity is a vector quantity and is defined as the rate of change of displacement of an object with time. On the other hand, acceleration is the time rate of change of velocity.

02

Step 2. Determination of velocity for zero acceleration

The acceleration is a=dvdt.

For zero acceleration, 0=dvdt.

This implies that the velocity is constant. Now, this constant value can take up any value, such as 5m/sor 7km/h.

For example, a car is under straight-line uniform motion, moving with a non-zero constant velocity of 80km/h. In this case, the acceleration is zero as there is no change in velocity.

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Most popular questions from this chapter

A rock is dropped from a sea cliff and the sound of it striking the ocean is heard 3.4 s later. If the speed of sound is 340 m/s, how high is the cliff?

Two cars emerge side by side from a tunnel. Car A is traveling with a speed of 60 km/h and has an acceleration of 40 km/h/min. Car B has a speed of 40 km/h and has an acceleration of 60 km/h/min. Which car is passing the other as they come out of the tunnel? Explain your reasoning.

A stone is dropped from the top of a cliff. It is seen to hit the ground below after 3.55 s. How high is the cliff?

Question: A ball is thrown straight up. What are the velocity and acceleration of the ball at the highest point in its path?

(a) v=0,a=0.

(b) v=0,a=9.8m/s2up.

(c) v=0,a=9.8m/s2down.

(d) v=9.8m/sup,a=0.

(e) v=9.8m/sdown,a=0.

Describe in words the motion of the object graphed in Fig. 2-33.
See all solutions

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