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