Font size
WorksheetsQuiz on Friction
Total questions: 24
Worksheet time: 39mins
What is friction?
A force that pushes objects
A force that opposes motion
A force that increases motion
None of the above
Which of the following surfaces will have the highest friction?
Polished marble floor
Wooden floor
Sandy road
Ice
Friction depends on:
The weight of the object
The roughness of the surfaces in contact
Both (a) and (b)
Neither (a) nor (b)
Friction can be reduced by:
Making surfaces rougher
Applying lubricants
Increasing the weight
Using rough materials
Why is friction considered a "necessary evil"?
It only causes problems
It is harmful in every situation
It helps in some activities but also causes wear and tear
It never helps in daily life
Which of the following is an example of useful friction?
Slipping on a wet floor
Brakes applied in a moving vehicle
Sliding a book across a table
None of the above
Which factor does not directly affect friction?
Roughness of the surface
Speed of the object
Weight of the object
Surface area in contact
How does friction affect machines?
Increases efficiency
Causes wear and tear
Decreases wear and tear
Has no effect
Which type of friction is the hardest to overcome?
Rolling friction
Sliding friction
Static friction
Fluid friction
Friction is reduced in streamlined shapes by:
Increasing the roughness
Decreasing the roughness
Applying more pressure
None of the above
Which of these statements is true regarding friction?
Friction always opposes motion
Friction helps objects move faster
Friction is not necessary for walking
Friction acts in the direction of motion
The type of friction experienced by a rolling ball is:
Static friction
Rolling friction
Sliding friction
None of the above
Which factor increases friction between two surfaces?
Making surfaces smoother
Adding lubricants
Adding weight
None of the above
When does friction become harmful?
When used in braking
When it causes wear and tear in machines
When it helps in walking
When it provides grip to tires
Friction is reduced in machines by using:
Water
Air
Lubricants
None of the above
Which of the following is not a way to reduce friction?
Using ball bearings
Applying oil
Making surfaces rougher
Using smooth surfaces
Friction is necessary for:
Writing on paper
Walking
Both (a) and (b)
None of the above
Why does sliding friction produce more heat than rolling friction?
Greater surface area in contact
Less surface area in contact
Sliding friction is weaker
Rolling friction is stronger
Which of the following is not a disadvantage of friction?
Causes wear and tear
Wastes energy
Provides grip for walking
Generates unnecessary heat
What kind of force is friction?
Contact force
Non-contact force
Gravitational force
Magnetic force
Friction always acts in the direction of the applied force.
TRUE
FALSE
Friction is independent of the roughness of the surface.
TRUE
FALSE
Define friction and explain why it is considered a necessary evil.
What are the factors affecting friction? Explain with examples.
