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