- 1. Friction is present whenever surfaces _________
A) touch
B) break open
C) are smooth
D) look like simple machines
- 2. Objects weigh more on Earth than they do the _________
A) ocean
B) moon
C) Milky Way
D) sun
- 3. The force on a magnet is called __________________
A) magnetic force
B) magneto
C) supernatural force
D) kryptonite
- 4. Forces that act on an object but cancel each other out are called ___________
A) unbalanced forces
B) balanced forces
C) air forces
D) force fields
- 5. Ships made of steel are still able to float
A) True
B) false
- 6. Levers have _________ parts
A) three
B) two
C) one
D) four
- 7. An inclined plane allows you to use ___________ force over a distance to make work easier
A) No
B) 2 times as much
C) less
D) more
- 8. Which simple machine does a flagpole make use of?
A) inclined plane
B) pulley
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) inclined plane
D) pulley
- 10. Machines reduce the amount of work needed to do a job
A) False
B) True
- 11. A knife and chisel are both ____________
A) inclined planes
B) screws
C) wedges
D) pulleys
- 12. What causes a ship to float in water?
A) fish
B) Aquaman
C) buoyant force
D) magnetic force
- 13. Which simple machine is part of a screw?
A) pulley
B) wheel and axle
C) inclined plane
D) fulcrum
- 14. Work uses force to move an object through a _________
A) magnetic field
B) pulley
C) wall
D) distance
- 15. A ____________ is an example of a simple machine called an inclined plane
A) pencil sharpener
B) flagpole
C) ramp
D) car
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