Answer: ω = 2πf.
- A ω = 2πf
- B ω = f/2π
- C ω = πf
- D ω = f
Correct answer: A. ω = 2πf
Explanation: ω = 2πf (angular frequency in rad/s = 2π times frequency in Hz).
In SHM, displacement and velocity are 90° out of phase (v is maximum when x=0, and zero when x is extreme), while acceleration is always exactly opposite in sign to displacement, consistent with a = −ω²x.
Concept context
Simple harmonic motion, spring-mass, pendulum, energy in SHM, and resonance.