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- 1. Multiple Choice
Which two of these forces act on parachutes?
Air Resistance
Gravity
Thrust
Kinetic Energy
- 2. Multiple Choice
What causes an object to fall faster?
Smaller surface area
Larger surface area
If it has a parachute
If it is softer
- 3. Multiple Choice
Another name for air resistance is...
Buoyancy
Streamline
Gravity
Drag
- 4. Multiple Choice
The larger the surface area of the moving object, the ___________ air resistance there is.
Less
More
Longer
Quicker
- 5. Multiple Choice
Air resistance pushes against falling
objects and __________________.
Speeds them up
Keeps them afloat
Slows them down
Spins them
- 6. Multiple Choice
The larger the parachute the ____________
Less air resistance
More surface tension
Less drag
More drag
- 7. Multiple Choice
Which has more air resistance?
- 8. Multiple Choice
Air resistance is a force caused by...
Water pushing against moving objects
Air pushing against moving objects
Gravity pushing against moving objects
Normal force pushing against moving objects
- 9. Multiple Choice
The more streamlined an object is, the...
More air resistance
Less air resistance
Slower air resistance
Faster air resistance
- 10. Fill in the Blank
What name is given to a substance which reduces friction between two surfaces?
- 11. Multiple Choice
Which is the best description of the purpose of a lubricant?
Reduces the amount of friction and increases the amount of thrust
Reduces the amount of friction and increases useful energy transfer
Reduces wasteful energy transfer and increases the amount of thrust
- 12. Multiple ChoiceFriction is a force that acts in an ___________ direction of movement.similaroppositeparallelwest
- 13. Multiple ChoiceHow does friction affect speed?more friction decreases speedmore friction increases speedless friction decreases speed
- 14. Multiple ChoiceThe rougher the surface, the faster an object will travel over the surface.TrueFalse
- 15. Multiple Choice
Which of these materials do you predict would have the MOST amount of friction?
metal
tile
sand paper
denim
- 16. Multiple Choice
Rough surfaces have _________
greater friction
less friction
the same level of friction
- 17. Multiple Choice
When we rub our hands together _________.
frictional force works between them
our hands become warm
all off the above
- 18. Multiple Choice
This friction is.....
useful
a problem
- 19. Multiple Choice
This friction is ...
useful
a problem
- 20. Multiple Choice
This friction is....
useful
a problem
- Answer choicesTagsAnswer choicesTags