Forces Review (From Textbook)
- 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) ocean
B) moon
C) Milky Way
D) sun
- 3. The force on a magnet is called __________________
A) magneto
B) kryptonite
C) supernatural force
D) magnetic force
- 4. Forces that act on an object but cancel each other out are called ___________
A) unbalanced forces
B) force fields
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) four
B) three
C) one
D) two
- 7. An inclined plane allows you to use ___________ force over a distance to make work easier
A) 2 times as much
B) less
C) more
D) No
- 8. Which simple machine does a flagpole make use of?
A) lever
B) inclined plane
C) screw
D) pulley
- 9. Which simple machine makes up a pencil sharpener? (the one mounted on the wall)
A) pulley
B) inclined plane
C) lawn tractor
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) pulleys
B) inclined planes
C) screws
D) wedges
- 12. What causes a ship to float in water?
A) Aquaman
B) magnetic force
C) buoyant force
D) fish
- 13. Which simple machine is part of a screw?
A) pulley
B) wheel and axle
C) inclined plane
D) fulcrum
- 14. Work uses force to move an object through a _________
A) pulley
B) wall
C) distance
D) magnetic field
- 15. A ____________ is an example of a simple machine called an inclined plane
A) pencil sharpener
B) ramp
C) flagpole
D) car
|
Učenci, ki so rešili ta test so rešili tudi :