Physics
Grade-9
Easy
Question
Choose the correct statement from the following:
Assertion: In oscillatory motion, displacement of a body from equilibrium can be represented by sine or cosine function.
Reason: The body oscillates to and from about its mean position.
- Assertion is correct, the reason is correct; the reason is not a correct explanation for assertion
- Assertion is incorrect, the reason is correct
- Assertion is correct, the reason is correct; the reason is a correct explanation for assertion
- Assertion is correct, reason is incorrect
Hint:
Oscillation is defined as the process of repeating variations of any quantity or measure about its equilibrium value in time.
The correct answer is: Assertion is correct, the reason is correct; the reason is not a correct explanation for assertion
- The motion in which the body moves to and fro repeatedly about its mean position is called oscillatory motion.
- So Assertion is correct, the reason is correct; the reason is not a correct explanation for assertion
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The displacement time graph of a particle executing S.H.M. is as shown in the figure:
The corresponding force-time graph will be:
The displacement time graph of a particle executing S.H.M. is as shown in the figure:
The corresponding force-time graph will be:
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Assertion: All small oscillations are simple harmonic.
Reason: Oscillations of a simple pendulum system are always simple harmonic whether the amplitude is small or large.
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Two simple pendulums of length 1 m and 16 m respectively are given small displacements at the same time in the same direction. The number of oscillations ‘N’ of the smaller pendulum for them to be in phase again is:
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Select the incorrect statement(s) from the following.
I. A simple harmonic motion is necessarily periodic.
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