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