Class 8 Science MCQ Force And Pressure

Question : A force applied on a moving body may
(a) bring it to rest
(b) increase its speed
(c) decrease the speed
(d) all of the above

Question : During dry weather, while combing hair, sometimes we experience hair flying apart. The force responsible for this is
(a) force of gravity
(b) force of friction
(c) electrostatic force
(d) magnetic force

Question : Force applied on an object in same direction
(a) Divide on another
(b) Add to one another
(c) Multiply on another
(d) Subtract to one another

Question : Which one of the following forces is a contact force?
(a) Force of gravity
(b) Magnetic force
(c) Force of friction
(d) Electrostatic force

Question : A When does a body float on water?
(a) When no force is acting on it.
(b) When the net force acting on the body is zero
(c) When there is a gravitational pull.
(d) When there is friction between the body and the water

Question : A force of 16N acts on an area of 50 cm². What is the pressure in pascal?
(a) 4200 Pa
(b) 5200 Pa
(c) 3200 Pa
(d) 2200 Pa

Question : Which of the following is the action-at-distance force ?
(a) muscular force
(B) frictional force
(c) magnetic force
(D) mechanical force

Question : Earth always pulls everything towards it due to
(a) muscular force
(b) mechanical force
(c) gravitational force
(d) electrostatic force

Question : A cart being carried by a horse is an example of
(a) muscular force
(b) mechanical force
(c) gravitational force
(d) electrostatic force

Question : If you press an inflated balloon, it deforms due to a type of
(a) contact force
(b) non-contact force
(c) gravitational force
(d) none of these

Question : Force exerted by the muscless is known as
(a) mechanical force
(b) gravitational force
(c) electrostatic force
(d) muscular force

Question : A hockey player uses his hockey stick –
(a) To push the ball
(b) To pull the ball
(c) To change its direction
(d) All of these

Question : A force when applied brings change in –
(a) Direction of motion of the body
(b) Speed of moving body
(c) Shape of the body
(d) Any of these

Question : The force exerted by a charged body on another charged or uncharged body is known as
(a) Magnetic force
(b) Gravitational force
(c) Electrostatic force
(d) Muscular force

Question : The force exerted by a charged body on another char
(a) gravitational force
(b) electrostatic force
(c) non-contact force
(d) contact force

Question :A charged balloon attaches to a wall because of ______
(a) Muscular force
(b) Electrostatic force
(c) Magnetic force
(d) Gravitational force

Question : The force responsible for the wearing out of the car tyres is –
(a) Frictional force
(B) Gravitational force
(c) Magnetic force
(D) Muscular force

Question : The force you will use to collect the iron nails scattered on a sandy ground is –
(a) Frictional force
(B)Gravitational force
(c) Magnetic force
(D) None of these

Question : The force you use to stretch a rubber band is –
(a) Frictional force
(B)Gravitational force
(c) Magnetic force
(D) Muscular force

Question : The SI unit of force is
(a) metre
(B) newton
(c) pascal
(D) second

Question : A contact force cannot act through
(a) empty space
(b) touching
(c) touching with a metal rod
(d) touching with a wooden rod

Question : A force that opposes the motion of one surface sliding over another is called
(a) friction
(B) newton
(c) lubrication
(D) ball bearing

Question : A spring balance is used for measuring
(a) mass
(b) weight
(c) pressure
(d) speed

Question : The strength of force is expressed by?
(a)weight
(b)mass
(c)magnitude
(d)longitudinal force

Question : A boat comes to rest if we stop rowing it due to:
(a) gravitation force
(b) force of friction
(c) muscular force
(d) none of these

Question : Which of the following actions describe pushing force?
(a) Kicking
(b) Lifting
(c) Picking
(d) Opening

Question : The force exerted by the earth to pull the object towards itself is called
(a) electrostatic force
(b) gravitational force
(c) muscular force
(d) contact force

Question :The ratio of force, acting perpendicular to the area, on which it acts is known as ________.
(a) Force
(b) Friction
(c) Presuure
(d) Density

Question :The force involved in falling an apple from a tree is:
(a) Magnetic force
(b) Contact force
(c) Electrostatic force
(d) Gravitational force

Question : The pressure exerted by the air is known as:
(a) air pressure
(b) gas pressure
(c) atmospheric pressure
(d) none of these

Question : Pushing a rock from a hill top is an example of:
(a) muscular force
(b) magnetic force
(c) frictional force
(d) electrostatic force

Question : By decreasing the contact area the pressure:
(a) is decreased
(b) remain same
(c) is increased
(d) none of these

Question :Force can increase or decrease the speed of a moving object.

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

Question :Force always has a particular direction.

Question :Friction is always harmful.

Question :A magnet attracts all metals towards itself.

Question :Gravity is a contact force.

Question :Buildings have wide foundations.

Question :It is easier to cut with a blunt knife than with a sharp knife.

Question :Weight is a measure of the gravitational attraction on a body.

Question :Horse can easily move in desert.

Question :The fountain pens start leaking at higher altitudes.

Question :The atmospheric pressure gradually falls as we go up above earth’s surface.

Question :The SI unit of pressure is Pascal.

Question :The pressure is exerted equally in all directions.

Question :The atmospheric pressure is measured with the help of an instrument called barometer.

Question :The north pole of a magnet ___________________ the north pole of another magnet.

Question :A women using pointed heels, exerts ___________________ pressure than while using a flat heel.

Question :To draw water from a well we have to ___________________ at the rope.

Question :A charged body ___________________ an uncharged body towards it.

Question :To move a loaded trolley we have to ___________________ it.

Question :The SI unit of pressure is ___________________.

Question :Force acting on a unit area is called ___________________.

Question :The lesser is the ___________________ of a solid, the more the pressure it exerts.

Question :An object slows down when force is applied on it in the ___________________ direction.

Question :___________________ is necessary to make body start moving from rest.

Question :The ___________________ of dough (kneaded flour) changes on pressing with a rolling pin (belan) to make chapatis.

Question :Pressure in liquids is measured by ___________________

Question :If force is increased, pressure ___________________

Question :Spring balance is used to measure ___________________ of the body.

Question :When you want to open the pencil box you ___________________ the lid and when you want to close the pencil box you down the lid of your pencil box.

Question :At a give depth a liquid exerts ___________________ pressure in all directions.

Question :The pressure of sea water increase with the increase in ___________________ of the sea.

Question :Pressure = Force ÷ ___________________.