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Chapter 2: Q14CQ (page 79)

Is it possible for velocity to be constant while acceleration is not zero? Explain.

Short Answer

Expert verified

No, it is not possible for velocity to be constant while acceleration is not zero.

Step by step solution

01

What is Acceleration

The rate at which an object's velocity changes with respect to time is known as acceleration.

The item experiences acceleration whenever its velocity changes.

As a result, anytime the magnitude or direction of velocity changes, a non-zero value of acceleration is associated with it.

02

Constant velocity will give Zero acceleration

Acceleration is a vector quantity. Its direction and magnitude depend upon the velocity vector.

The direction of acceleration is the same as that of the change in velocity.

Hence if there is no change in velocity, there would not be acceleration.

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Most popular questions from this chapter

(a) A world record was set for the men’s 100 mdash in the 2008 Olympic Games in Beijing by Usain Bolt of Jamaica. Bolt “coasted” across the finish line with a time of . If we assume that Bolt accelerated for3.00 sto reach his maximum speed, and maintained that speed for the rest of the race, calculate his maximum speed and his acceleration.

(b) During the same Olympics, Bolt also set the world record in the200 mdash with a time of 19.30 s Using the same assumptions as for the 100 mdash, what was his maximum speed for this race?

A swan on a lake gets airborne by flapping its wings and running on top of the water.

(a) If the swan must reach a velocity of6.00 m/s to take off and it accelerates from rest at an average rate of 0.350 m/s2, how far will it travel before becoming airborne?

(b) How long does this take?

Find the following for path A in Figure 2.59:

(a) The distance travelled.

(b) The magnitude of the displacement from start to finish.

(c) The displacement from start to finish.

An object that is thrown straight up falls back to Earth. This is one-dimensional motion.

(a) When is its velocity zero?

(b) Does its velocity change direction?

(c) Does the acceleration due to gravity have the same sign on the way up as on the way down?

What is the last thing you should do when solving a problem? Explain.
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