Say I was compressing a spring with high k value in a vice (not sure why I’d want to do that but it’s hypothetical).
As F =k(dx), there would be a force acting back against the vice when I compress the spring. In practice, how can the vice stay put and not unwind when a force is pushing back on it?
In: 3
The force is applied at an angle. This angle causes the force to increase or decrease in strength. This basic principle allows screws to work.
A rotational force is amplified quite a bit to close the jaws. Conversely, any force on the jaws generates a pretty weak rotational force on the screw.
Both forces create friction that scales with the force. Ten times as much force means ten times as much friction. Since the force from it being backdriven *starts off weaker than the friction*, it will *always* be weaker than the friction, unless the friction decreases somehow.
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