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A particle is executing simple harmonic motion with a time period T. At time t=0, it is at its position of equilibrium. The kinetic energy - time graph of the particle will look like:

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Important Questions on Oscillations

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1 kg block attached to a spring vibrates with a frequency of 1 Hz on a frictionless horizontal table. Two springs identical to the original spring are attached in parallel to a 8 kg block placed on the same table. So, the frequency of vibration of the 8 kg block is 
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In an experiment to determine the period of a simple pendulum of length 1 m, it is attached to different spherical bobs of radii r1 and r2 . The two spherical bobs have uniform mass distribution. If the relative difference in the periods, is found to be 5×10-4 s, the difference in radii, r1-r2 is best-given by
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A body of mass M and charge q is connected to a spring of spring constant k. It is oscillating along x-direction about its equilibrium position in the horizontal plane, taken to be at x=0, with an amplitude A. An electric field E is applied along the x-direction. Which of the following statements is correct?
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A spring mass system (mass m, spring constant k and natural length l ) rests in equilibrium on a horizontal disc. The free end of the spring is fixed at the centre of the disc. If the disc together with spring mass system rotates about it's axis with an angular velocity ω,k>>mω2 the relative change in the length of the spring is best given by the option:
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 A ring is hung on a nail. It can oscillate, without slipping or sliding (i) in its plane with a time period T1 and (ii) back and forth in a direction perpendicular to its plane, with a period T2. The ratio T1T2 will be :
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The displacement time graph of a particle executing SHM is given in figure: (sketch is schematic and not to scale) 

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Which of the following statements is/are true for this motion? 

(A) The force is zero at t=3T4
(B) The magnitude of acceleration is maximum at t=T
(C) The speed is maximum at t=T4
(D) The P.E. is equal to K.E. of the oscillation at t=T2

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The weight suspended from a spring oscillates up and down. The acceleration of weight will be zero at
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When a body is in SHM, then match the following.

List - I List - II
A Velocity is maximum I Acceleration is maximum
B KE is 34th  of total energy II At mean position
C PE is 34th of total energy III At half of the amplitude
D Acceleration is maximum IV At 32 times the amplitude