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# Give answer! Which one of the following is a simple harmonic motion

Which one of the following is a simple harmonic motion

• Option 1)

Wave moving through a string fixed at both ends

• Option 2)

Earth spinning about its own axis

• Option 3)

Ball bouncing between two rigid vertical wells

• Option 4)

Particle moving in a circle with uniform speed

Answers (2)
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WAVE MOVING THROUGH A STRING FIXED AT BOTH END

Simple harmonic waves are set up in a string fixed at the two ends.

Resultant of two SHM with different frequency -

$x= x_{1}+x_{2}= A_{1}\sin w_{1}t+A_{2}\sin w_{2}t$

- wherein

This resultant motion is not SHM

Option 1)

Wave moving through a string fixed at both ends

This is correct.

Option 2)

Earth spinning about its own axis

This is incorrect.

Option 3)

Ball bouncing between two rigid vertical wells

This is incorrect.

Option 4)

Particle moving in a circle with uniform speed

This is incorrect.

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