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- 1. Multiple Choice
Sports men especially footballer's use spiked shoes to ______friction
Increase
Decrease
Keep constant
None
- 2. Multiple Choice
When the applied force more than the limit of________friction the body starts to moves
sliding
fluid
rolling
static
- 3. Multiple Choice
Friction is independent of__________
roughness of surface
normal force
area of contact
all of them
- 4. Multiple Choice
The frictional force exerted by fluids is also called as_______
Rolling friction
sliding friction
static friction
drag
- 5. Multiple Choice
It is always________to roll a body than to slide it over a surface
difficult
easier
hard
tough
- 6. Multiple Choice
A force that opposes motion between any surfaces that are in contact.
gravity
acceleration
friction
direction
- 7. Multiple Choice
Which type of friction is shown in the picture?
rolling
fluid
static
sliding
- 8. Multiple Choice
Which type of friction is shown in the picture?
fluid
static
rolling
sliding
- 9. Multiple Choice
If the following objects were dropped from the same height, which one would hit the floor first?
- 10. Multiple Choice
Which type of friction is shown in the picture?
rolling
static
fluid
sliding
- 11. Multiple Choice
Adding oil will ________ friction on gear chains.
increase
decrease
- 12. Multiple Choice
Which type of friction is shown in the picture?
fluid
static
rolling
sliding
- 13. Multiple Choice
Which boy A or B will slide down faster
A
B
A and B
- 14. Multiple Choice
What does the strength of the force depend on? Check the answers that apply.
The types of surfaces
The weather
How hard the surfaces push together
motion
- 15. Multiple Choice
A hard wood floor has more friction than a carpet.
true
false
- 16. Multiple Choice
_____________ friction acts on objects that are not moving.
sliding
rolling
static
fluid
- 17. Multiple Choice
Sliding friction is when two _____________ surfaces slide over one another.
liquid
oil
solid
- 18. Multiple Choice
Rolling friction is when an object ___________ over a surface.
bounces
rolls
slides
- 19. Multiple Choice
Fluid friction happens with objects moving through ______________ or ___________________.
gases or liquids
solids or liquids
gases or solids
- 20. Multiple Choice
Air resistance is a type of fluid friction.
True
False
- 21. Multiple Choice
Static friction prevents you from slipping when you walk on a sidewalk.
True
False
- 22. Multiple Choice
You can move heavy boxes by sliding them over the ground, or you can put them on a dolly and then roll them over the ground. Which way makes it easier to move the boxes? Why?
Sliding the boxes on the floor is easier than using the dolly because rolling friction is less than sliding friction
Sliding the boxes on the floor is easier than using the dolly because sliding friction is less than rolling friction.
Rolling the boxes over the floor on the dolly is easier because sliding friction is less than rolling friction.
Rolling the boxes over the floor on the dolly is easier because rolling friction is less than sliding friction.
- 23. Multiple Choice
You use _____ friction when you leave marks on paper with a pencil “lead.”
static friction.
sliding friction.
rolling friction.
- 24. Multiple Choice
Sliding friction is stronger than static friction.
TRUE
FALSE
- 25. Multiple Choice
The weakest type of friction that occurs between solid surfaces is _____ friction.
sliding friction
rolling friction
static friction
None of the above
- 26. Multiple Choice
The friction force acts in the ...................... direction of movement
Same
Opposite
sometime Opposite
- 27. Multiple Choice
True or False: objects that are smooth have LESS friction than objects that are rough
TRUE
FALSE
- 28. Multiple ChoiceWheels on a skateboard most likely experiences-Rolling FrictionSliding FrictionFluid FrictionStatic Friction
- 29. Multiple ChoiceSally experiences-Rolling FrictionSliding FrictionFluid FrictionStatic Friction
- 30. Multiple ChoiceWheels of a shopping cart experience-Rolling FrictionSliding FrictionFluid FrictionStatic Friction
- 31. Multiple ChoiceSwimming fish experience-Rolling FrictionSliding FrictionFluid FrictionStatic Friction
- 32. Multiple ChoiceThe rougher the surface, the faster an object will travel over the surface.TrueFalse
- 33. Multiple Choice
Friction is an example of _____________
contact force
non contact force
both of these
none of these
- 34. Multiple Choice
Which of these materials do you predict would have the MOST amount of friction?
metal
tile
sand paper
denim
- 35. Multiple Choice
Rough surfaces have _________
greater friction
less friction
the same level of friction
- 36. Multiple Choice
When we rub our hands together _________.
frictional force works between them
energy is released
our hands become warm
all off the above
- 37. Multiple ChoiceWhich of the following is an example of friction that is helpful?Brakes used on a bikeTires from a car on the roadTread on the bottom of your shoesAll are examples that are helpful
- 38. Multiple ChoiceWhich of the following is an example of friction that is harmful?Pencil marking on paperEngine parts wearing outsand placed on ice in the winterUsing an eraser to erase marks
- 39. Multiple Choice
There are _________ types of friction.
2
1
4
5
- 40. Multiple ChoiceHow can friction be reduced?reduce the force acting between the 2 surfacesreduce the roughness of the 2 surfaces coming in contactuse wax, grease or oilall of the above are ways of reducing friction
- 41. Multiple Choice
To sharpen the blade of a knife by rubbing it against a surface, which of the following will be most suitable?
Stone
Plastic block
There is no need to sharpen a knife
Glass block
- 42. Multiple Choice
It is difficult to walk on an oily floor because
Floor gets spoiled
Floor hates oil so it makes it difficult to walk on it until oil is removed
Force of friction is high
Force of friction is very less
- 43. Multiple Choice
Spring balance is a device used for measuring the _____________ acting on an object.
number of molecules or atoms
weight
force
food
- 44. Multiple Choice
A matchstick struck on a matchbox catches fire easily because
Friction produces heat
Of chemical reaction
Matchstick is afraid of us
Matchstick obeys us because we are their masters
- 45. Multiple Choice
Friction has only disadvantages
True
False
Don't ask me!!
- 46. Multiple Choice
Friction increases with
Roughness of surface area in contact
Normal force
Area of contact
Only 1 & 2
All of the above
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