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d4rr3n
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I find physics classroom demonstrations of centripetal force dishonest, they often resort to trickery to demonstrate this apparent "inward pull" on a body in circular motion. Two examples follow
1, Centripetal force "pulling" a candle flame towards the center of a spinning turntable
2, Centripetal force "pulling" cork/bob floating in water towards the center of a spinning
In the first demonstration air is being centrifuged outwards and the displacement of air is causing the flame to point inwards, it is actually being pushed inwards not pulled inwards.
In the second demonstration its the same basic principle, water is centrifuged outwards causing the bob or cork to point inwards.
In actual fact all demonstrations to demonstrate this apparent inwards force have resorted to trickery. We know that in practice there is no inward force if there were our clothes would be projected inwards whilst spinning in a spin dryer, we know that in actual fact the opposite is true.
Is it ok to resort to misdirection and trickery to demonstrate the apparent "inward pull" on a body in circular motion?
1, Centripetal force "pulling" a candle flame towards the center of a spinning turntable
2, Centripetal force "pulling" cork/bob floating in water towards the center of a spinning
In the first demonstration air is being centrifuged outwards and the displacement of air is causing the flame to point inwards, it is actually being pushed inwards not pulled inwards.
In the second demonstration its the same basic principle, water is centrifuged outwards causing the bob or cork to point inwards.
In actual fact all demonstrations to demonstrate this apparent inwards force have resorted to trickery. We know that in practice there is no inward force if there were our clothes would be projected inwards whilst spinning in a spin dryer, we know that in actual fact the opposite is true.
Is it ok to resort to misdirection and trickery to demonstrate the apparent "inward pull" on a body in circular motion?
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