Forces Review (From Textbook)
- 1. Friction is present whenever surfaces _________
A) touch
B) are smooth
C) break open
D) look like simple machines
- 2. Objects weigh more on Earth than they do the _________
A) moon
B) ocean
C) sun
D) Milky Way
- 3. The force on a magnet is called __________________
A) kryptonite
B) supernatural force
C) magneto
D) magnetic force
- 4. Forces that act on an object but cancel each other out are called ___________
A) unbalanced forces
B) force fields
C) balanced forces
D) air forces
- 5. Ships made of steel are still able to float
A) false
B) True
- 6. Levers have _________ parts
A) two
B) three
C) four
D) one
- 7. An inclined plane allows you to use ___________ force over a distance to make work easier
A) less
B) more
C) No
D) 2 times as much
- 8. Which simple machine does a flagpole make use of?
A) inclined plane
B) pulley
C) lever
D) screw
- 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) True
B) False
- 11. A knife and chisel are both ____________
A) inclined planes
B) pulleys
C) wedges
D) screws
- 12. What causes a ship to float in water?
A) magnetic force
B) Aquaman
C) fish
D) buoyant force
- 13. Which simple machine is part of a screw?
A) inclined plane
B) fulcrum
C) wheel and axle
D) pulley
- 14. Work uses force to move an object through a _________
A) wall
B) pulley
C) magnetic field
D) distance
- 15. A ____________ is an example of a simple machine called an inclined plane
A) ramp
B) pencil sharpener
C) flagpole
D) car
|
Alunos que fizeram este teste também fizeram :