Forces Review (From Textbook)
- 1. Friction is present whenever surfaces _________
A) break open
B) touch
C) are smooth
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) magneto
B) kryptonite
C) magnetic force
D) supernatural force
- 4. Forces that act on an object but cancel each other out are called ___________
A) force fields
B) unbalanced forces
C) air forces
D) balanced forces
- 5. Ships made of steel are still able to float
A) false
B) True
- 6. Levers have _________ parts
A) two
B) four
C) one
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) screw
C) pulley
D) inclined plane
- 9. Which simple machine makes up a pencil sharpener? (the one mounted on the wall)
A) pulley
B) wheel and axle
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) screws
B) inclined planes
C) pulleys
D) wedges
- 12. What causes a ship to float in water?
A) buoyant force
B) magnetic force
C) Aquaman
D) fish
- 13. Which simple machine is part of a screw?
A) pulley
B) wheel and axle
C) fulcrum
D) inclined plane
- 14. Work uses force to move an object through a _________
A) magnetic field
B) distance
C) pulley
D) wall
- 15. A ____________ is an example of a simple machine called an inclined plane
A) flagpole
B) pencil sharpener
C) car
D) ramp
|
Azok a diákok, akik elvégezték ezt a tesztet, szintén elvégezték :