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Science
Simple Machines
8 questions · Staff Pick
1
Which simple machine is a ramp?
Lever
Wedge
✓Inclined plane
Pulley
2
What simple machine do scissors use?
✓Lever and wedge
Pulley
Wheel and axle
Screw
3
A doorknob is an example of which simple machine?
Lever
Inclined plane
✓Wheel and axle
Pulley
4
Which simple machine makes it easier to lift a flag up a flagpole?
Lever
✓Pulley
Wedge
Screw
5
What is the fixed point on which a lever rests called?
Pivot
✓Fulcrum
Axle
Load
6
A jar lid uses which simple machine?
Lever
Pulley
Wedge
✓Screw
7
Which simple machine is a knife blade?
Screw
Wheel and axle
✓Wedge
Lever
8
Simple machines make work easier by doing what?
Eliminating the need for force
✓Changing the direction or amount of force needed
Adding energy to a system
Reducing the weight of objects
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