The potential energy of a simple harmonic oscillator when the particle is half way to its end point is

Which one of the following statements is true for the speed v and the acceleration a of a particle executing simple harmonic motion?

In case of a forced vibration, the resonance peak becomes very sharp when the

A mass is suspended separately by two different springs in (successive order then time periods is t₁ and t₂ respectively, If it is connected by both spring as shown in figure then time period is t₀ , the correct relation is