6. The door knob is an example of what of simple machine?
A. wedge
B. screw
C. wheel and axle
D. pulley
A. wedge
B. screw
C. wheel and axle
D. pulley
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Answer:
6.C. wheel and axle
Explanation:
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Answer:
wheel and axle
Explanation:
A doorknob is considered a wheel and axle because it has a wheel portion, the knob, and an axle, the rod in the door, that turns on the same axis. A force applied to the outer rim of a wheel creates greater torque on the axle than the same force applied to an axle without a wheel.