- 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) motion
B) work
C) friction
D) distance
- 3. A wheel barrow is an example of a ______ class lever.
A) first
B) third
C) fourth
D) second
- 4. Which is an example of a wheel and axle that make work easier by reducing friction?
A) pencil sharpener
B) screwdriver
C) ladder
D) wheelbarrow
- 5. Which part of the lever supplies the force to move something?
A) fulcrum
B) load
C) effort
- 6. Which part of the lever is the part you are trying to move?
A) fulcrum
B) load
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) lever
B) screw
C) pulley
D) inclined plane
- 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
|