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