Forces Review (From Textbook) - Quiz
- 1. Friction is present whenever surfaces _________
A) look like simple machines
B) touch
C) break open
D) are smooth
- 2. Objects weigh more on Earth than they do the _________
A) Milky Way
B) sun
C) ocean
D) moon
- 3. The force on a magnet is called __________________
A) magneto
B) kryptonite
C) magnetic force
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) three
B) four
C) one
D) two
- 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) screw
B) pulley
C) inclined plane
D) lever
- 9. Which simple machine makes up a pencil sharpener? (the one mounted on the wall)
A) pulley
B) lawn tractor
C) inclined plane
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) inclined planes
B) pulleys
C) screws
D) wedges
- 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) inclined plane
C) fulcrum
D) wheel and axle
- 14. Work uses force to move an object through a _________
A) wall
B) magnetic field
C) pulley
D) distance
- 15. A ____________ is an example of a simple machine called an inclined plane
A) pencil sharpener
B) ramp
C) car
D) flagpole
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