Answer: 2T.
- A T/2
- B T
- C 2T
- D 4T
Correct answer: C. 2T
Explanation: T ∝ √m, so 4× mass gives √4 = 2T.
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.