a) Key terms

b) angular frequency ω; ω = 2π/T or ω = 2πf

displacement = shortest distance from equilibrium position

amplitude = maximum displacement from equilibrium position

period = time taken to complete one oscillation

frequency = number of oscillations completed per unit time

angular frequency = rate of change of angle

• ω = 2π/T

  • angular frequency (rads^-1) = (2 × π) / period (s)

• ω = 2πf

  • angular frequency (rads^-1) = 2 × π × frequency (Hz)

phase difference = difference in displacement between two oscillating objects