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