Force and Pressure Class 8 MCQs Questions with Answers
I. Choose the correct option.
Question 1.
The pressure which is exerted by air around us is known as
(a) force
(b) atmospheric pressure
(c) muscular force
(d) friction
Answer
Answer: (b) atmospheric pressure
Question 2.
Force acting on per unit area is called
(a) non-contact forces
(b) contact forces
(c) force
(d) pressure
Answer
Answer: (d) pressure
Question 3.
A __________ exerted by an object on another is a force.
(a) Push or pull
(b) Contact or non-contact force
(c) Pressure
(d) Magnitude
Answer
Answer: (a) Push or pull
Question 4.
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
Answer
Answer: (b) gravitational force
Question 5.
Muscular force is also called __________ force.
(a) non-contact
(b) contact
(c) gravitational
(d) magnetic
Answer
Answer: (b) contact
Question 6.
The force exerted by a charged body on another charged or uncharged body is called
(a) gravitational force
(b) electrostatic force
(c) non-contact force
(d) contact force
Answer
Answer: (b) electrostatic force
Question 7.
Force changes the
(a) motion of body
(b) speed of body
(c) shape of body
(d) all of these
Answer
Answer: (d) all of these
Question 8.
The force exerted by our muscle is called
(a) electrostatic force
(b) muscular force
(c) gravitational force
(d) non-contact force
Answer
Answer: (b) muscular force
Question 9.
1 kilogram weight is equal to
(a) 98 N
(b) 9.8 N
(c) 0.98 N
(d) 0.098 N
Answer
Answer: (b) 9.8 N
Question 10.
A spring balance is used for measuring
(a) mass
(b) weight
(c) pressure
(d) speed
Answer
Answer: (b) weight
Question 11.
Two boys A and B are applying force on a block. If the block moves towards the boy A, which one of the following statements is correct?
(a) Magnitude of force applied by A is greater than that of B.
(b) Magnitude of force applied by A is smaller than that of B.
(c) Net force on the block is towards B.
(d) Magnitude of force applied by A is equal to that of B.
Answer
Answer: (b) Magnitude of force applied by A is smaller than that of B.
Question 12.
When two forces act in opposite directions, then net force acting is the
(a) sum of two forces
(b) difference between two forces
(c) both of these
(d) none of these
Answer
Answer: (b) difference between two forces
Question 13.
The strength of force is expressed by its
(a) weight
(b) mass
(c) magnitude
(d) longitudinal force
Answer
Answer: (c) magnitude
Question 14.
Leaves fall down on the ground due to
(a) electrostatic force
(b) magnetic force
(c) gravitational force
(d) muscular force
Answer
Answer: (c) gravitational force
Question 15.
State of motion is described by
(a) Position of rest
(b) Position of motion
(c) Both by the state of rest or motion
(d) None of these
Answer
Answer: (c) Both by the state of rest or motion
Question 16.
When the hammer strikes the gong of an electric bell, which of the following force is responsible for the movement of hammer?
(a) Gravitational force alone
(b) Magnetic force alone
(c) Electrostatic force alone
(d) Frictional force alone
Answer
Answer: (c) Electrostatic force alone
Question 17.
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
Answer
Answer: (c) electrostatic force
Question 18.
A container is filled with water as shown in the given figure. Which of the following statements is correct about pressure of water?
(a) Pressure at A > Pressure at B > Pressure at C
(b) Pressure at A = Pressure at B = Pressure at C
(c) Pressure at A < Pressure at B > Pressure at C
(d) Pressure at A < Pressure at B < Pressure at C
Answer
Answer: (d) Pressure at A < Pressure at B < Pressure at C
Question 19.
Two objects repel each other. This repulsion could be due to
(a) frictional force only
(b) electrostatic force only
(c) magnetic force only
(d) either a magnetic or an electrostatic force
Answer
Answer: (d) either a magnetic or an electrostatic force
Question 20.
Which one of the following forces is a contact force?
(a) Force of gravity
(b) Magnetic force
(c) Force of friction
(d) Electrostatic force
Answer
Answer: (c) Force of friction
Question 21.
A brick is kept in three different ways on a table as shown in given figure. The pressure exerted by the brick on the table will be
(a) maximum in position A
(b) maximum in position C
(c) maximum in position B
(d) equal in all cases
Answer
Answer: (a) maximum in position A
II. Fill in the Blanks
Question
1. We the bucket to take out water from well.
Answer
Answer: pull
Question 2.
The strength of a force is usually expressed by its .
Answer
Answer: magnitude
Question 3.
force is the force resulting due to the action of muscles.
Answer
Answer: Muscular
Question 4.
The envelop of air all around us is called .
Answer
Answer: atmosphere
Question 5.
To open a door we or the door.
Answer
Answer: push, pull
Question 6.
Force of friction is an example of force.
Answer
Answer: contact
Question 7.
Force is called pressure.
Answer
Answer: per unit area
Question 8.
Force has as well as direction.
Answer
Answer: magnitude
Question 9.
Fruits fall due to the force of gravity.
Answer
Answer: downward
Question 10.
The body at rest is called body.
Answer
Answer: stationary
Question 11.
and forces are the two kinds of forces.
Answer
Answer: Contact, non-contact
Question 12.
Force exerted by magnet is called force.
Answer
Answer: magnetic
Question 13.
We apply force on while walking.
Answer
Answer: ground
Question 14.
Force is to pressure.
Answer
Answer: directly proportional
Question 15.
The is measured by an instrument called barometer.
Answer
Answer: atmospheric pressure
III. True or False
Question 1.
Force applied on an object in opposite directions add to one another.
Answer
Answer: False
Question 2.
Pressure does not depend on area of contact.
Answer
Answer: False
Question 3.
A force can change the state of motion of an object.
Answer
Answer: True
Question 4.
Force cannot change the speed of an object.
Answer
Answer: False
Question 5.
Atmospheric pressure is less at higher altitudes.
Answer
Answer: True
Question 6.
Force of gravity is a contact force.
Answer
Answer: False
Question 7.
Muscular force is also known as contact force.
Answer
Answer: True
Question 8.
Pascal is the unit of force.
Answer
Answer: False
Question 9.
To move an object faster it has to be pushed or pulled repeatedly.
Answer
Answer: True
Question 10.
Magnitude is the strength of force.
Answer
Answer: True
Question 11.
Force can change the shape of an object.
Answer
Answer: True
Question 12.
At least two objects must interact for a force to come into play.
Answer
Answer: True
Question 13.
Magnetic force is a non-contact force.
Answer
Answer: True
Question 14.
An apple from a tree falls on the ground due to the force of gravity.
Answer
Answer: True
Question 15.
Newton is the unit of force.
Answer
Answer: True
IV. Match the following
Column I | Column II |
1. Pressure | (a) Fluid pressure |
2. Barometer | (b) Unit of pressure |
3. Newton | (c) Non-contact force |
4. Manometer | (d) Force/Area |
5. Pascal | (e) Unit of force |
6. Magnetic force | (f) Net force acting on a body |
7. 1 kilogram | (g) Atmospheric pressure |
8. Resultant force | (h) 9.8 N |
9. Frictional force | (i) Down the column |
10. Pressure increases | (j) Contact force |
Answer
Answer:
Column I | Column II |
1. Pressure | (d) Force/Area |
2. Barometer | (g) Atmospheric pressure |
3. Newton | (e) Unit of force |
4. Manometer | (a) Fluid pressure |
5. Pascal | (b) Unit of pressure |
6. Magnetic force | (c) Non-contact force |
7. 1 kilogram | (h) 9.8 N |
8. Resultant force | (f) Net force acting on a body |
9. Frictional force | (j) Contact force |
10. Pressure increases | (i) Down the column |
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