Chapter 4.1

Question 1

Periodic motion

Answer 1

Motion that is repetitive

Question 2

Period

Answer 2

The time taken to complete one full oscillation

Question 3

Amplitude

Answer 3

The maximum displacement from the equilibrium position

Question 4

Restoring force

Answer 4

A force that brings the system back towards its equilibrium position when the system is displaced away from equilibrium

Question 5

Simple harmonic motion (SMH)

Answer 5

Oscillations where the magnitude of the acceleration of the body that has been displaced is proportional to the displacement and the direction of the acceleration is towards the equilibrium position

Question 6

SMH expressed mathematically

Answer 6

Acceleration is proportional to negative displacement

Question 7

Main characteristics of SMH

Answer 7

The period and amplitude are constant
The period is independent of the amplitude
The displacement, velocity and acceleration are sine or cosine functions of time

Question 8

Frequency

Answer 8

The number of full oscillations per second

Question 9

Phase difference

Answer 9

The difference in phase between two different waves