- 1. A ______ is a push or a pull.
A) force
B) simple machine
C) pulley
D) friction
- 2. Simple machines make work easier by trading _____ for force.
A) distance
B) motion
C) friction
D) work
- 3. A wheel barrow is an example of a ______ class lever.
A) second
B) third
C) first
D) fourth
- 4. Which is an example of a wheel and axle that make work easier by reducing friction?
A) pencil sharpener
B) ladder
C) screwdriver
D) wheelbarrow
- 5. Which part of the lever supplies the force to move something?
A) fulcrum
B) effort
C) load
- 6. Which part of the lever is the part you are trying to move?
A) effort
B) fulcrum
C) load
- 7. What should you do to reduce the amount of effort needed to lift something using a first class lever?
A) move the fulcrum to the middle of the lever
B) move the fulcrum closer to the load
C) move the fulcrum closer to the effort
- 8. Which simple machine does a flagpole make use of?
A) screw
B) pulley
C) inclined plane
D) lever
- 9. Which simple machine makes up a pencil sharpener? (the one mounted on the wall)
A) lawn tractor
B) wheel and axle
C) inclined plane
D) pulley
- 10. Machines reduce the amount of work needed to do a job
A) True
B) False
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