Class 8 Science MCQ Friction

Question : Which of the following statements is correct?
(a) Rolling is easier than sliding.
(b) Sliding is easier than rolling.
(c) Dragging is easier than sliding
(d) Dragging is easier than rolling.

Question : To increase friction:
(a) the surface is made smooth
(b) the surface is polished
(c) the surface is made rough
(d) powder is sprinkled on the surface

Question : Smooth surface has
(a) less friction
(b) more friction
(c) sometimes less and sometimes more
(d) all of these

Question :It is difficult to walk on an oily floor because
(a)Floor gets spoiled
(b)There is more resistance
(c)Force of friction is high
(d) Force of friction is very less

Question :Spring balance is a device used for measuring the _____________ acting on an object.
(a)mass
(b)pressure
(c)force
(d)None of the above

Question :A matchstick struck on a matchbox catches fire easily because
(a)Friction may cause fire
(b)Of chemical reaction
(c)Force heated the match stick
(d)None of the above

Question :Tyres are treaded to
(a)look good
(b)Increase friction
(c)increase its longivity
(d)increase weight of the tyre

Question :Lubricants are substances which
(a)Increase friction
(b)Are used to light fire
(c)Reduce friction
(d)Are used to put out a fire

Question :Sliding friction is _________ than / to rolling friction
(a)smaller
(b)greater
(c)equal
(d)None of the above

Question :The frictional force exerted by fluids is also called ______
(a)drug
(b)drag
(c)drop
(d)drown

Question :Four children were asked to arrange forces due to rolling, static and sliding frictions in an increasing order. Their arrangements are given below. Choose the correct arrangement.
(a)Rolling, Static, Sliding
(b)Static, Rolling, Sliding
(c)Rolling, sliding, static
(d)Sliding, Static, Rolling

Question :A boat or an aeroplane has a pointed or tapering front / head. Why?
(a)To increase the friction of fluid
(b)To reduce the friction of fluid
(c)To look good
(d)For no reason

Question :The sole of the shoes becomes plain after wearing it for several months. The reason is
(a)Wearing out due to friction
(b)Wearing out due to no friction
(c)Sole is of bad quality
(d)None of the above

Question :The shape of the airplane is like a
(a) Bird
(b) Car
(c) Dog
(d) All

Question :Fluid are____
(a) Gases and liquids both
(b) Gases
(c) Liquids
(d) None of the options

Question :What kind of substances are known as lubricants
(a) Decrease friction
(b) Increase friction
(c) Increase or decrease friction
(d) None of the options

Question :Friction is a __________
(a) Contact force
(b) Non-contact force
(c) Magnetic force
(d) None of the options

Question :Rolling friction is smaller than?
(a) All of these
(b) Sliding friction
(c) Static friction
(d) Fluid friction

Question :Lubricants ________
(a) Reduce friction
(b) Increase friction
(c) Increase friction and reduce friction
(d) None of the options

Question :Friction is a /an_______
(a) Evil and foe
(b) Evil
(c) Foe
(d) None of the options

Question :On what force of friction depends?
(a) All of these
(b) Smoothness of surface
(c) Roughness of surface
(d) Inclination of surface

Question :Which one of these characteristics does a smooth surface has?
(a) Less frictional force
(b) More frictional force
(c) Sometimes less and sometimes more force
(d) All of these

Question :Complete the sentence. Friction always ____________
(a) Opposes the motion
(b) Helps the motion
(c) Helps the motion and opposes the motion
(d) None of the options

Question : Ball-bearings are used to convert static friction into:
(a) drag
(b) sliding friction
(c) rolling friction
(d) none of these

Question : Which one of these characteristics does a smooth surface has?
(a) Less frictional force
(b) More frictional force
(c) Sometimes less and sometimes more force
(d) All of above

Question : Lubricants ________
(a) Increase friction
(b) Reduce friction
(c) Both (a) and (b)
(d) None

Question : Smooth surface has
(a) less frictional force
(b) more frictional force
(c) sometimes less and sometimes more force
(d) all the above

Question : Which Of The Following Is Not An Advantage Of Fiction?
(a) It enables drawing to be made on paper
(b) It enables fallen things to be picked up
(c) It enables rubber pads to be rubbed off
(d) It enables vehicles to move on ground

Question : A Toy Car Released With The Same Initial Speed Will Travel Farthest On:
(a) Muddy
(b) Polished marble surface
(c) Cemented surface
(d) Brick surface

Question : What type of a force is friction?
(a) Contact force
(b) Non-contact force
(c) Electrostatic force
(d) Magnetic force

Question : Which Of The Following Will Produce The Maximum Friction?
(a) Rubbing of sand paper on glazed paper
(b) Rubbing of sand paper on glass table top
(c) Rubbing of sand paper on aluminium frame
(d) Rubbing of sand paper on sand paper

Question : Which of the following is characteristic of friction?
(a) It is a non-contact force
(b) It works on only resting body
(c) It works opposite to direction of motion
(d) It can change the direction of motion

Question : Friction the rehuye motion between Io surfaces In contact.
(a) favours
(b) opposes
(c) is
(d) none of these

Question :Friction is the force that slows down or keeps them from moving.

Question :Wheels reduce the friction between a moving body and the ground.

Question :Powder applied to a carrom-board increase friction.

Question :A new truck tyre will cause less friction with the road than an old worn out tyre.

Question :Oil is applied to machines to increase friction.

Question :Sliding friction is much less than rolling friction.

Question :Friction between the two surfaces can be reduced by polishing the surface.

Question :Friction helps you to walk more easily on a slippery surface.

Question :Friction can produce heat.

Question :Rubbing of our palms makes us feel cold.

Question :Stricking a matchstick produces fire by friction.

Question :Friction acting on a moving body always act in the direction of motion of the body.

Question :Friction of air makes the meteors burn.

Question :Soles of shoes and tyres are treaded to decrease friction.

Question :Friction opposes the fixing of nail in the wall.

Question :Sliding friction is ___________________.. than the static friction.

Question :The force which opposes the motion of a body is ___________________

Question :Friction is more on a ___________________.. surface than on a ___________________.. surface.

Question :The friction between moving parts of a machine can be ___________________.. by putting some machine oil on the parts.

Question :Friction opposes the ___________________.. between the surfaces in contact with each other.

Question :Friction depends on the ___________________.. of surfaces.

Question :Friction produces ___________________..

Question :Sprinkling of powder on the carrom-board ___________________.. friction.

Question :___________________.. are used in machines to protect their surfaces from wear and tear caused by friction.

Question :Smooth surfaces ___________________.. friction.

Question :___________________.. between two surfaces interlock to produce friction.

Question :Shape of the objects moving in fluids is ___________________.. to overcome friction exerted by liquids.

Question :Friction always works in ___________________.. direction of the motion of the surface.

Question :Soapy floor is slippery due to ___________________.. friction.

Question :Friction increases with increase in ___________________

Question :If friction is not exerted than the moving bodies will never ___________________

Question :Grooves on tyres ___________________.. friction between the tyre and road.

Question :___________________.. enables us to move by providing the force that prevents us from slipping.

Question :Rolling friction ___________________.. is than sliding friction.

Question :___________________.. friction comes into play when we try to move an object at rest.