Sagot :
Answer:
A doorknob is a simple machine that only has two main parts. Six basic types of simple machines exist: the lever, inclined plane, wedge, pulley, screw and the wheel and axle. Of these, the doorknob most closely resembles the wheel and axle.
Explanation:
Hope it Helps
Answer:
1.lever
2.wheel and axle
Explanation:
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