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Which of the following is a necessary and sufficient condition for ?
(a)Constant period.
(b)Constant acceleration.
(c)Proportionality between acceleration and velocity.
(d)Proportionality between restoring force and displacement from equilibrium position.

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Important Questions on Oscillations
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Which of the following statements is wrong for a ?

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For a particle executing simple harmonic motion, which of the following statements is not correct?

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A body of mass is attached to the lower end of a spring whose upper end is fixed. The spring has negligible mass. When the mass is slightly pulled down and released, it oscillates with a time period of . When the mass is increased by the time period of oscillations becomes . The value of is

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Spring is pulled down by . What is amplitude of its motion?
