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