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WorksheetsFriction V2
Total questions: 40
Worksheet time: 22mins
Which of the following produces least friction
Sliding
Rolling
Static
Composite
The paper on a book has ........ Surface
Rough
Smooth
Spring balance is a device used to measure ........ Of an object
Pressure
Mass
Area
None of these
Arrange the friction in decreasing order
Rolling, Sliding, Static
Static, rolling, sliding
Sliding, static, rolling
Static, sliding, rolling
Smooth surfaces have
More irregularities
Less irregularities
Friction can produce heat and (a)
Friction is undesirable in
Walking
Heating of machines
Swimming
Braking
Friction is always useful for us
True
False
Friction can act in same as well as opposite direction of force
True
False
Friction depends on area of contact
True
False
Friction can never be eliminated
True
False
Sliding friction is lesser them
Rolling friction
Static friction
Air resistance decreases with increase in speed
True
False
Tyres of which vehicles are biggest treads among the following?
Bike
Car
Excavator
Bus
Which of the following is used in powdered form as lubricant?
Salt
Graphite
Sugar
Sand
Which of the following surfaces will offer the least friction?
Cement floor
Plastic floor
Wooden floor
Ice
Least amount of friction is required in which of the following sports?
Car racing
Carrom
Football
Tug of war
An object is at rest on the floor. A force is applied to move it. The type of friction force it has to overcome is
Rolling friction
Sliding friction
Air drag
None of these
Friction is a (a) Quantity
Friction is a type of
Pressure
Force
Illusion
Friction can never act when an object is
Flying
Underwater
At rest
Going very slow
A block is sliding on a horizontal surface. It's friction can be increased by
Increasing the mass of the block
Polishing the surface
Increasing the surface area
By putting a second block on the top
Which of the following statement is not true
Friction produces heat
Friction can bring objects to rest
Friction is always useful
Friction can make things slow down
Mixer Jar becomes hot after running for a while because of
Electricity
Friction
Cooking ingredients
Dabba company mixer
Fluid friction experienced is greater in
Water
Oil
Honey
Orange juice
Fishes can swim easily underwater because of their
Shape
Practice
Mass
Energy
Surface of the cotton cloth have
Rough surfaces
Smooth surfaces
Thermos flask keeps the liquid inside it warm by
Reducing friction
Increasing friction
Preventing heat loss
None of these
Our atmosphere is made up of fluids
True
False
Why is it difficult to start a bicycle from rest than to pedal when it is already moving?
Static friction is lesser than rolling friction
Static friction is greater than rolling friction
None of these
Streamlined shape can reduce
force
pressure
mass
strength
as surface area of the object increases, drag experienced by it
increases
decreases
remains the same
if two bodies, one cube and another cuboid of equal masses and same surface are slid down a road, which will experience more friction
cube
cuboid
equal
none of these
Sun is hot because of friction
True
False
When you sit on a chair for a long time, it gets heated because of friction
True
False
Friction is the strongest force in nature
True
False
Air friction only acts because of gravity
True
False
Friction in liquids is ............ than friction in gases
greater
less
equal
Heat generated in human body is mainly due to friction between blood vessels and blood
True
False
Friction can be increased by rubbing coarse substance on your hands
True
False
