A seesaw and scissors are both first-class levers. What common feature do they share?

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A Load in the middle
B Effort in the middle
C Fulcrum in the middle
D No fixed point

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Answer: C. Fulcrum in the middle

In a first-class lever the fulcrum lies between the effort and the load. In a seesaw the pivot is in the middle, and in scissors the joint (screw) sits between the handles and the blades.

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A seesaw and scissors are both first-class levers. What common feature do they share?

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