Chapter 5, Problem 1AC

To determine

The term used for the repeating back-and-forth motion, from the following options.

1. spring.

2. vibration.

3. wave.

4. pulse.

Answer to Problem 1AC

Solution:

Option (b) is correct.

Explanation of Solution

Reason for the correct options:

The term vibration is used for the motion of a particle which repeats itself. Hence, a back-and-forth motion that repeats itself is termed as a vibration.

Hence, option (b) is correct.

Reason for the incorrect options:

Option (a) is incorrect because spring itself does not create back-and-forth motion. When the spring is attached with a mass at its end and can compress or stretch, then the motion it creates is back-and-forth motion about its unstretched position. So, it is a wrong answer.

Option (c) is incorrect because the wave is an example of back-and-forth motion but in this case, the movement may or may not involve matter. It does not repeat itself. So, it is a wrong answer.

Option (d) is incorrect because the pulse is a type of non-sinusoidal wave. It is a type of back-and-forth motion, but it does not repeat itself. So, it is a wrong answer.

Hence, options (a), (c) and (d) are incorrect.

Conclusion:

The vibration is a repeating back-and-forth motion.