Answer: 0.157 m/s.
- A 0.05 m/s
- B 0.157 m/s
- C 0.314 m/s
- D 1 m/s
Correct answer: B. 0.157 m/s
Explanation: v<sub>max</sub> = Aω = 0.05·(2π/2) = 0.05π ≈ 0.157 m/s.
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.