Force and pressure are important concepts in physics. This chapter explains how forces can push, pull, or change an object’s motion. You would also learn about contact and non-contact forces like friction, gravity, and magnetism. You would also know about how pressure depends on force and area. Simple experiments in the chapter show how force can change shape, speed, or direction. The ideas in the chapter try to connect physics concepts to real-life examples like inflating balloons or pulling a rope in a tug-of-war.
The MCQs and match-the-following questions for Chapter 8 cover key topics like types of forces, atmospheric pressure, and the effect of friction. The questions are created to test your understanding and prepare you for exams. Solving these will help you remember key facts and concepts quickly.
Class 8 Science Chapter 8 MCQ Online Test Questions and Answers
Question 1. What is a force?
a) A measure of speed
b) A push or pull
c) A change in shape
d) A type of energy
Answer:
b) A push or pull
Question 2. Which action is an example of force?
a) Sitting on a chair
b) Pushing a door to open
c) Observing a flower
d) Listening to music
Answer:
b) Pushing a door to open
Question 3. What causes a ball to stop rolling on the ground?
a) Gravity
b) Friction
c) Air pressure
d) Magnetic force
Answer:
b) Friction
Question 4. What happens when two forces act in opposite directions?
a) They cancel each other out
b) The net force is the sum of both forces
c) The net force is the difference of both forces
d) The object moves faster
Answer:
c) The net force is the difference of both forces
Question 5. What is the net force when two equal forces act in opposite directions?
a) Zero
b) Equal to one of the forces
c) Double the force
d) Negative force
Answer:
a) Zero
Question 6. What can force not change in an object?
a) Its speed
b) Its direction
c) Its shape
d) Its weight
Answer:
d) Its weight
Question 7. What is friction?
a) A non-contact force
b) A force acting opposite to motion
c) A force that increases motion
d) A magnetic force
Answer:
b) A force acting opposite to motion
Question 8. Which force is responsible for the motion of a car on a sloped road?
a) Magnetic force
b) Gravitational force
c) Frictional force
d) Electrostatic force
Answer:
b) Gravitational force
Question 9. What kind of force is muscular force?
a) Contact force
b) Non-contact force
c) Frictional force
d) Magnetic force
Answer:
a) Contact force
Question 10. Which of the following is a non-contact force?
a) Muscular force
b) Gravitational force
c) Frictional force
d) Force exerted by a spring
Answer:
b) Gravitational force
Question 11. What does the force of gravity act on?
a) Only objects on Earth
b) Only gases
c) All objects
d) Only living beings
Answer:
c) All objects
Question 12. What happens when you press a rubber ball?
a) Its volume decreases
b) Its weight increases
c) Its shape changes
d) Its size doubles
Answer:
c) Its shape changes
Question 13. Which force acts between the north pole of one magnet and the south pole of another?
a) Repulsive force
b) Electrostatic force
c) Gravitational force
d) Attractive force
Answer:
d) Attractive force
Question 14. What is atmospheric pressure?
a) The force of air on objects
b) The weight of air above a surface
c) The speed of air molecules
d) The amount of water vapor in the air
Answer:
b) The weight of air above a surface
Question 15. What happens to pressure when force increases and area remains constant?
a) Pressure increases
b) Pressure decreases
c) Pressure remains constant
d) Pressure becomes zero
Answer:
a) Pressure increases
Question 16. What is the effect of force on a stationary object?
a) It starts moving
b) Its shape changes
c) It stays stationary
d) Its weight increases
Answer:
a) It starts moving
Question 17. Which force is responsible for bringing a moving boat to rest?
a) Magnetic force
b) Electrostatic force
c) Frictional force
d) Gravitational force
Answer:
c) Frictional force
Question 18. What happens to pressure if the area of contact decreases?
a) It increases
b) It decreases
c) It remains the same
d) It becomes zero
Answer:
a) It increases
Question 19. What happens to the speed of a moving object when a force is applied in the direction of motion?
a) It decreases
b) It increases
c) It remains constant
d) It becomes zero
Answer:
b) It increases
Question 20. What kind of force is friction?
a) Non-contact force
b) Contact force
c) Gravitational force
d) Electrostatic force
Answer:
b) Contact force
Question 21. What is the net force when two unequal forces act in the same direction?
a) The sum of the forces
b) The difference of the forces
c) Zero
d) Half of the larger force
Answer:
a) The sum of the forces
Question 22. What happens to a stationary object if balanced forces act on it?
a) It starts moving
b) It deforms
c) It remains stationary
d) It moves backward
Answer:
c) It remains stationary
Question 23. What force is applied when you squeeze a tube of toothpaste?
a) Magnetic force
b) Muscular force
c) Gravitational force
d) Frictional force
Answer:
b) Muscular force
Question 24. Which force prevents a book from sliding off a tilted table?
a) Frictional force
b) Gravitational force
c) Magnetic force
d) Muscular force
Answer:
a) Frictional force
Question 25. What force is responsible for the movement of planets around the Sun?
a) Magnetic force
b) Gravitational force
c) Electrostatic force
d) Contact force
Answer:
b) Gravitational force
Question 26. What happens when you inflate a balloon?
a) Its weight increases
b) Its shape and size change
c) It becomes heavier than air
d) It remains unchanged
Answer:
b) Its shape and size change
Question 27. Why do porters use a piece of cloth on their heads when carrying heavy loads?
a) To reduce pressure
b) To increase pressure
c) To balance the load
d) To reduce friction
Answer:
a) To reduce pressure
Question 28. Which force allows a straw to stick to a wall after rubbing it with paper?
a) Frictional force
b) Electrostatic force
c) Magnetic force
d) Gravitational force
Answer:
b) Electrostatic force
Question 29. What determines the amount of pressure exerted on a surface?
a) Mass and speed of an object
b) Force and area of contact
c) Weight and volume of an object
d) Height of the object
Answer:
b) Force and area of contact
Question 30. What is the SI unit of force?
a) Joule
b) Newton
c) Pascal
d) Meter per second
Answer:
b) Newton
Question 31. What happens to water in a tube when atmospheric pressure is removed?
a) It remains in the tube
b) It falls out of the tube
c) It moves upward
d) It evaporates immediately
Answer:
b) It falls out of the tube
Question 32. What is the direction of the frictional force on a moving object?
a) Opposite to the direction of motion
b) In the direction of motion
c) Perpendicular to the motion
d) Randomly oriented
Answer:
a) Opposite to the direction of motion
Question 33. Why does a sharp knife cut more effectively than a blunt one?
a) It exerts less force
b) It increases pressure due to smaller area
c) It is made of stronger material
d) It requires more effort
Answer:
b) It increases pressure due to smaller area
Question 34 – Match the Following
| Column A | Column B |
|---|---|
| 1. Force exerted by air on a surface | A. Electrostatic force |
| 2. Force responsible for the motion of planets | B. Friction |
| 3. Contact force resisting motion | C. Gravitational force |
| 4. Force exerted by charged bodies | D. Magnetic force |
| 5. Force between poles of magnets | E. Atmospheric pressure |
Answer:
| Column A | Correct Answer |
|---|---|
| 1. Force exerted by air on a surface | E. Atmospheric pressure |
| 2. Force responsible for the motion of planets | C. Gravitational force |
| 3. Contact force resisting motion | B. Friction |
| 4. Force exerted by charged bodies | A. Electrostatic force |
| 5. Force between poles of magnets | D. Magnetic force |
