Forces Review (From Textbook)
  • 1. Friction is present whenever surfaces _________
A) break open
B) are smooth
C) touch
D) look like simple machines
  • 2. Objects weigh more on Earth than they do the _________
A) moon
B) Milky Way
C) sun
D) ocean
  • 3. The force on a magnet is called __________________
A) magnetic force
B) supernatural force
C) magneto
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) false
B) True
  • 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) more
B) No
C) less
D) 2 times as much
  • 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) lawn tractor
B) pulley
C) wheel and axle
D) inclined plane
  • 10. Machines reduce the amount of work needed to do a job
A) False
B) True
  • 11. A knife and chisel are both ____________
A) pulleys
B) wedges
C) inclined planes
D) screws
  • 12. What causes a ship to float in water?
A) buoyant force
B) fish
C) magnetic force
D) Aquaman
  • 13. Which simple machine is part of a screw?
A) wheel and axle
B) pulley
C) fulcrum
D) inclined plane
  • 14. Work uses force to move an object through a _________
A) pulley
B) wall
C) magnetic field
D) distance
  • 15. A ____________ is an example of a simple machine called an inclined plane
A) ramp
B) car
C) pencil sharpener
D) flagpole
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