How to apply a angular force to the object?

Questions
1

How to apply a angular force to the object? I want to maker a Fidget Spinner game .

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2

You can try to apply opposing forces and offset them from the center.

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3

You can use physics.apply_force() to add a force to your object. If you apply it on the perimeter of your object and at a tangential angle, you can correlate the force needed to achieve a specific torque.

See formula here

4

I have an example of this here: https://github.com/britzl/publicexamples/tree/master/examples/rotate_collision_object

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