578
How much torque do you think a broom makes?
(lemmy.world)
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this post was submitted on 04 Oct 2024
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Torque is a measurement of rotational force. Brooms would technically have thrust. If I remember my high school physics, a Broom would need at least 980 Newtons of thrust to liftoff your average sized witch.
What’s an average sized witch?
Probably one with under about 980 Newtons weight
About the weight of a duck.
I got better.
Assuming that's it's just the normal force of Earth's gravity at work on the witch, it's just a case of working Newton's second backwards with the gravitational "constant" acceleration ≈ 9.8 m/s²:
F = ma
980 N = m × 9.8 m/s²
980 / 9.8 = (m × 9.8) / 9.8, units omitted for text clarity
100 kg = m
In other words, op is assuming that an average size witch masses approximately 100kg (or about 220 lbs in fingers, knees, and toes units).
That's not enough for flight, only enough to nullify gravity. It makes sense OP would leave some trust for acceleration
They'll flap their arms for propulsion
Using Hocus Pocus as a data sample, Bette Midler is the average sized witch.
So no torque, then? Unless the witches are rotating so fast we can't perceive it with the human eye, like a car's wheels travelling alongside you at a particular speed.