Mechanical ComprehensionQuestion 93 of 120
Which simple machine is a doorknob an example of?
a.Wheel and axle
b.Pulley
c.Wedge
d.Inclined plane
Explanation
A doorknob turns a shaft, so the large knob and thin spindle form a wheel and axle. Turning the larger wheel produces a stronger turning force on the smaller axle.
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