Spyke
lemmy.world

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.

37
Player2reply
lemm.ee

Probably one with under about 980 Newtons weight

14
lemmy.world

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).

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Dagnetreply
lemmy.world

That's not enough for flight, only enough to nullify gravity. It makes sense OP would leave some trust for acceleration

14

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.

3

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How much torque do you think a broom makes? | Spyke