1
Q
What is a first-class lever?
A
A lever in which the fulcrum is positioned between the load and the effort.
2
Q
What is a second-class lever?
A
A lever in which the load is positioned between the fulcrum and the effort.
3
Q
What is a third-class lever?
A
A lever in which the effort is positioned between the fulcrum and the load.
4
Q
Define “pivot”.
A
The central point, pin, or shaft on which a mechanism turns or oscillates.
5
Q
Define “fulcrum”.
A
The point on which a lever rests or is supported.
6
Q
Define “lever”.
A
A rigid bar resting on a pivot.
7
Q
What are mechanisms?
A
A system of parts working together in a machine.
8
Q
Define “mechanical advantage”.
A
Force amplifying the effectiveness of a simple machine.
Grade 7: Technology
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