18.1-18.4 Oscillations (AQA)

What is the equilibrium position in an oscillation?

The point at which an object experiences no resultant force and thus no acceleration (the 'rest' position of an object).

How many radians of phase are there in one complete oscillation?

2 x pi

How do you calculate the angular frequency of an oscillation?

2 x pi x the frequency of the oscillation

What are the conditions required for SHM?

The acceleration of an object is proportional, to its displacement from equilibrium and always in the opposite direction.

What is the acceleration of an object undergoing SHM when it's displacement is zero?

Zero

What is an Isochronous oscillator?

An oscillator with a period/frequency that is not dependent on amplitude.

What is a fiducial marker?

A pin or pointer placed at the equilibrium position of an oscillation.

What measures can be taken to improve the accuracy when measuring the time period of SHM?

Time over multiple oscillations and calculate the average of several repeats.

What is the kinetic energy of an SHM oscillator at maximum displacement?

Zero

How does the total energy in an SHM oscillator vary with time?

It is constant.

At what displacement is the potential energy of an SHM oscillator at a maximum?

At maximum displacement (x=±A).

How do you calculate the total energy of an SHM oscillator from its amplitude?

E = ½ k A²