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