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Does air resistance increase or decrease the period of a simple pendulum?

madlad
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1 Answers1

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You can see that air resistance increases the period by a common-sense argument, without doing any maths.

Suppose the mass is at its maximum position, and moves to the central position in time $t$. If there is air resistance, the speed of movement of the mass will be less because the air resistance slows it down, and therefore $t$ will be larger.

alephzero
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