- 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) sun
B) moon
C) Milky Way
D) ocean
- 3. The force on a magnet is called __________________
A) supernatural force
B) kryptonite
C) magneto
D) magnetic force
- 4. Forces that act on an object but cancel each other out are called ___________
A) balanced forces
B) force fields
C) unbalanced forces
D) air forces
- 5. Ships made of steel are still able to float
A) false
B) True
- 6. Levers have _________ parts
A) three
B) two
C) four
D) one
- 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) pulley
B) screw
C) lever
D) inclined plane
- 9. Which simple machine makes up a pencil sharpener? (the one mounted on the wall)
A) pulley
B) inclined plane
C) wheel and axle
D) lawn tractor
- 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) inclined planes
C) pulleys
D) screws
- 12. What causes a ship to float in water?
A) magnetic force
B) fish
C) Aquaman
D) buoyant force
- 13. Which simple machine is part of a screw?
A) inclined plane
B) wheel and axle
C) pulley
D) fulcrum
- 14. Work uses force to move an object through a _________
A) pulley
B) magnetic field
C) wall
D) distance
- 15. A ____________ is an example of a simple machine called an inclined plane
A) pencil sharpener
B) car
C) ramp
D) flagpole
|