The set has three parts: 25 concept and application questions, 15 statement-based, assertion-reason and match questions, and 10 achiever (higher-order thinking) questions. Full solutions are given at the end.

Quick Revision: Key Points

• Pressure = force ÷ area (unit: pascal, 1 Pa = 1 N/m²). Weight is a force and is measured in newtons.
• A force can change speed, direction of motion and shape, but not mass.
• Gravitational, magnetic and electrostatic forces act without contact. Muscular force and friction need contact.
• Liquid pressure increases with depth and acts in all directions. Gas pressure is caused by particles hitting the walls.
• Atmospheric pressure is due to the weight of air above us, decreases with height, and is measured with a barometer.

Olympiad Exam Tips

• Read all four options before choosing. Olympiad options are often very close to each other.
• Convert everything to SI units (N, m², Pa) before calculating. Remember 1 cm² = 0.0001 m².
• In assertion-reason questions, decide whether A is true and whether R is true separately. Only then decide if R explains A.
• In statement-based questions, test each statement on its own and eliminate options one by one.
• Practice with a timer, at about one minute per question.

How to use this set: attempt Part A first, then Part B and Part C. Mark the questions you found tricky in this class 8 Olympiad physics force pressure MCQs and read their solutions carefully.

Practice Questions: 50 Olympiad-Style MCQs

Part A: Concept and Application (Q1 to Q25)

1. Which of the following is NOT an effect of a force on an object?

(a) Change of mass

(b) Change of speed

(c) Change of direction of motion

(d) Change of shape

2. Which of the following is an example of a non-contact force?

(a) A magnet attracting iron pins

(b) Hitting a cricket ball

(c) Pulling a rope

(d) Pushing a door

3. The gravitational force of the Earth acts:

(a) only on falling objects

(b) only on heavy objects

(c) only in air

(d) on all objects, whether at rest or in motion

4. The gravitational force between two objects is always:

(a) repulsive

(b) attractive

(c) zero

(d) both attractive and repulsive

5. Which of these can keep a body at rest?

(a) 4 N towards the east and 4 N towards the west along the same line

(b) 8 N towards the north and 6 N towards the south along the same line

(c) 5 N towards the east and 5 N towards the east

(d) 3 N upward and 2 N upward

6. You push against a wall with all your strength, but the wall does not move. This is because:

(a) no force acts on the wall

(b) the forces on the wall are balanced, so the net force is zero

(c) the wall is too light

(d) a push is a non-contact force

7. Which quantity does NOT change when a brick is turned from its largest face to its smallest face on the floor?

(a) The area of contact

(b) The pressure

(c) The weight of the brick

(d) Both (a) and (b)

8. Two blocks, one of iron and one of wood, have the same weight and the same base area. The pressure they exert on a table is:

(a) equal

(b) greater for the iron block

(c) greater for the wooden block

(d) zero for the wooden block

9. Railway tracks are laid on wide concrete sleepers in order to:

(a) make the track look neat

(b) spread the load over a larger area and reduce the pressure on the ground

(c) increase friction

(d) reduce the cost of the track

10. Deep-sea divers wear special suits because:

(a) water pressure increases with depth

(b) the sea water is salty

(c) the sea is cold

(d) sunlight is less in deep water

11. In a building with an overhead water tank, the water pressure at the tap is highest on the:

(a) top floor

(b) middle floor

(c) same on all floors

(d) ground floor

12. A bottle is filled with water and has two holes at the same height on opposite sides. Water spurts out:

(a) more from the left hole

(b) more from the right hole

(c) equally from both holes

(d) from neither hole

13. Atmospheric pressure exists because of:

(a) wind only

(b) the Sun’s heating only

(c) the Earth’s rotation only

(d) the weight of the column of air above us

14. A sealed packet of chips is carried from a plain to a hill station. The packet looks:

(a) shrunken

(b) puffed up

(c) unchanged

(d) melted

15. Which of these can be explained by atmospheric pressure?

(a) Drinking with a straw

(b) A rubber suction hook sticking to a wall

(c) Liquid being drawn into a syringe

(d) All of these

16. The pressure of a gas inside a closed container is caused by:

(a) the weight of the container

(b) the gas particles colliding with the walls

(c) the color of the gas

(d) gravity only

17. Which is a correct unit of pressure?

(a) N/m²

(b) N/m

(c) N·m

(d) kg/m

18. A force of 1 N acts on an area of 1 cm². The pressure is:

(a) 1 Pa

(b) 100 Pa

(c) 10,000 Pa

(d) 1,000,000 Pa

19. Which exerts the greater pressure: 100 N on an area of 2 m², or 40 N on an area of 0.5 m²?

(a) The first

(b) The second

(c) Both are equal

(d) They cannot be compared

20. The SI unit of weight is:

(a) kilogram

(b) meter

(c) liter

(d) newton

21. A person stands first on both feet and then on one foot (feet are of equal size). The pressure on the ground when standing on one foot is:

(a) the same

(b) half

(c) double

(d) zero

22. A brick is placed on soft sand in three different ways. It sinks the most when it rests on its:

(a) largest face

(b) smallest face

(c) middle-sized face

(d) all faces equally

23. Two forces of 8 N and 6 N act on a body along the same line. The greatest and least possible net forces are:

(a) 14 N and 2 N

(b) 14 N and 0 N

(c) 2 N and 0 N

(d) 8 N and 6 N

24. The instrument used to measure atmospheric pressure is a:

(a) barometer

(b) seismograph

(c) speedometer

(d) odometer

25. Which pair contains only non-contact forces?

(a) Gravitational and muscular

(b) Magnetic and electrostatic

(c) Frictional and magnetic

(d) Muscular and frictional

Part B: Statement-Based, Assertion-Reason and Match (Q26 to Q40)

For assertion-reason questions (Q30 to Q35 and Q40), choose:

(a) Both A and R are true, and R is the correct explanation of A

(b) Both A and R are true, but R is not the correct explanation of A

(c) A is true, but R is false

(d) A is false, but R is true

26. Which statements are correct?

(i) A force can change the shape of an object.

(ii) A force can change the direction of motion of an object.

(iii) A force can change the mass of an object.

(iv) A force can change the speed of an object.

(a) (i), (ii) and (iii)

(b) (i), (ii) and (iv)

(c) (ii), (iii) and (iv)

(d) All four

27. Which statements are correct?

(i) Muscular force is a contact force.

(ii) Frictional force is a contact force.

(iii) Gravitational force is a contact force.

(iv) Magnetic force is a non-contact force.

(a) (i), (ii) and (iv)

(b) (ii) and (iii)

(c) (i), (iii) and (iv)

(d) All four

28. Which statements about liquid pressure are correct?

(i) It increases with depth.

(ii) It acts only downward.

(iii) It also acts on the side walls of the container.

(iv) It is the same at all depths.

(a) (i) and (ii)

(b) (ii) and (iv)

(c) (i) and (iii)

(d) (iii) and (iv)

29. Which statements about atmospheric pressure are correct?

(i) It exists because air has weight.

(ii) It decreases with increasing height above the ground.

(iii) It is zero inside a closed room.

(iv) It acts in all directions.

(a) (i), (ii) and (iii)

(b) (ii), (iii) and (iv)

(c) (i), (iii) and (iv)

(d) (i), (ii) and (iv)

30. A: Heavy trucks have many wheels.

R: More wheels increase the area of contact with the road, so the pressure on the road decreases.

31. A: Pressure is the same as force.

R: Pressure is force acting per unit area.

32. A: Water spurts out farthest from the lowest hole of a tall bottle filled with water.

R: Liquids can flow.

33. A: A person is not crushed by the large atmospheric pressure.

R: The pressure inside the body balances the pressure of the atmosphere.

34. A: A gas exerts pressure on the walls of its container.

R: A gas exerts pressure only in the downward direction.

35. A: If two forces act on an object, it must move.

R: Two equal and opposite forces along the same line can keep an object at rest.

36. Match the force with its example.

(a) P-4, Q-3, R-1, S-2

(b) P-3, Q-4, R-2, S-1

(c) P-3, Q-4, R-1, S-2

(d) P-1, Q-2, R-3, S-4

37. Match the quantity with its unit or instrument.

(a) P-4, Q-2, R-1, S-3

(b) P-4, Q-2, R-3, S-1

(c) P-2, Q-4, R-3, S-1

(d) P-1, Q-3, R-2, S-4

38. Arrange these pressures in increasing order:

A: 200 N on 1 m²; B: 50 N on 0.1 m²; C: 300 N on 3 m²; D: 10 N on 0.01 m².

(a) A < B < C < D

(b) C < A < B < D

(c) D < B < A < C

(d) B < A < D < C

39. Which statements are correct?

(i) Increasing the force on the same area increases the pressure.

(ii) Decreasing the area under the same force increases the pressure.

(iii) Increasing the area under the same force increases the pressure.

(iv) Pressure does not depend on the area.

(a) (iii) and (iv)

(b) (i) and (iii)

(c) (i) and (ii)

(d) (ii) and (iv)

40. A: A syringe fills with liquid when its plunger is pulled back.

R: Atmospheric pressure pushes the liquid into the syringe.

Part C: Achievers (Q41 to Q50)

41. A rectangular block weighing 400 N has dimensions 0.5 m × 0.4 m × 0.2 m. The ratio of the maximum to the minimum pressure it can exert on the ground is:

(a) 1.25

(b) 2

(c) 2.5

(d) 5

42. A man weighing 600 N stands with a total contact area of 0.03 m² between his feet and the ground. A child weighing 200 N exerts the same pressure on the ground. Her total contact area is:

(a) 0.01 m²

(b) 0.02 m²

(c) 0.03 m²

(d) 0.06 m²

43. Take atmospheric pressure as 10⁵ Pa. The force exerted by air on one side of a window of size 2 m × 0.5 m is:

(a) 10⁴ N

(b) 2 × 10⁵ N

(c) 10⁶ N

(d) 10⁵ N

44. A car weighing 12,000 N stands on four tires. Each tire has a contact area of 300 cm². The pressure exerted on the ground is:

(a) 10,000 Pa

(b) 40,000 Pa

(c) 100,000 Pa

(d) 400,000 Pa

45. A box is pulled along a floor by three forces along the same line: 40 N to the right, 25 N to the left, and a friction force of 10 N to the left. The net force is:

(a) 75 N to the right

(b) 5 N to the left

(c) 15 N to the right

(d) 5 N to the right

46. Forces of 30 N towards the east and 18 N towards the west act on a body. What additional force will keep the body in balance?

(a) 12 N towards the east

(b) 48 N towards the west

(c) 12 N towards the west

(d) 30 N towards the west

47. A block exerts a pressure of 500 Pa on the floor. An identical block is placed exactly on top of it. The pressure on the floor now becomes:

(a) 1,000 Pa

(b) 250 Pa

(c) 500 Pa

(d) 2,000 Pa

48. A block exerts a pressure of 500 Pa on the floor. Instead of stacking, an identical block is placed next to it on the floor. The pressure on the floor under each block is:

(a) 250 Pa

(b) 500 Pa

(c) 1,000 Pa

(d) 2,000 Pa

49. On a hill, atmospheric pressure falls from 100 kPa to 80 kPa. By how much does the force of air on a 0.5 m² area decrease?

(a) 1,000 N

(b) 20,000 N

(c) 10,000 N

(d) 40,000 N

50. A cube of side 0.2 m rests on a table. Another cube of the same weight has a side of 0.1 m. The ratio of the pressure exerted by the smaller cube to that of the bigger cube is:

(a) 1/4

(b) 2

(c) 8

(d) 4

Answers and Solutions

Part A

Part B

Part C

Keep Practicing

Try the other practice sets for this chapter:

• Force and Pressure MCQs Class 8: 20 Easy Questions + Answers
• Force and Pressure Class 8: 20 Difficult MCQs with Solutions

Found a mistake or want more chapters? Leave a comment below and we will update this post.

The post Essential Force and Pressure MCQs for Class 8 Olympiad first appeared on Winner Science.

Additionally, let us start with class 8 force and pressure difficult questions.

Practice them with pen and paper. Use the solutions at the end to check steps of your working for class 8 force and pressure difficult questions.

Quick Revision: Formulas and Tips

• Pressure P = F ÷ A. This also gives F = P × A and A = F ÷ P.
• Convert units before calculating: 1 cm² = 0.0001 m² and 1 kPa = 1,000 Pa.
• A block has the same weight on every face, so it exerts the greatest pressure on its smallest face and the least on its largest face.
• Forces along the same line add up if they act in the same direction and are subtracted if they act in opposite directions. A net force of zero means the forces are balanced.
• Balanced forces do not change the state of rest or motion of an object.
• Atmospheric pressure at sea level is about 10⁵ Pa (100 kPa).
• Liquid pressure increases with depth, and at a given depth it acts equally in all directions.

How to use this set: work out each question on paper.

Additionally, compare with the answer key.

For class 8 force and pressure difficult questions if your answer does not match, read the solution and redo calculation.

Practice Questions: 20 Difficult MCQs

1. A force of 300 N acts on an area of 0.15 m². The pressure is:

(a) 45 Pa

(b) 450 Pa

(c) 20,000 Pa

(d) 2,000 Pa

2. A force of 90 N acts on an area of 30 cm². The pressure is:

(a) 3 kPa

(b) 30 kPa

(c) 300 kPa

(d) 0.3 kPa

3. A box weighing 120 N rests on a table with a face of area 0.04 m² touching the table. It is turned so that a face of area 0.01 m² touches the table. The pressure:

(a) becomes half

(b) doubles

(c) becomes 4 times

(d) becomes 16 times

4. In a tug of war, team A pulls the rope with 450 N to the right and team B pulls with 380 N to the left. The net force on the rope is:

(a) 70 N towards A

(b) 830 N towards A

(c) 0 N

(d) 70 N towards B

5. A book weighing 15 N rests on a table. The upward force exerted by the table on the book is:

(a) 0 N

(b) 30 N

(c) 15 N

(d) 7.5 N

6. Three forces act on a box along the same line: 12 N towards the east, 5 N towards the west and 7 N towards the west. The net force is:

(a) zero

(b) 24 N east

(c) 12 N east

(d) 2 N west

7. A tall bottle has three holes at different heights on its side and is filled with water. Water spurts out farthest from the:

(a) lowest hole

(b) top hole

(c) middle hole

(d) all holes equally

8. Atmospheric pressure at sea level is about:

(a) 10 Pa

(b) 100,000 Pa

(c) 1,000 Pa

(d) 10,000,000 Pa

9. Take atmospheric pressure as 10⁵ Pa. The force exerted by air on one side of a tabletop of area 0.5 m² is about:

(a) 5,000 N

(b) 500,000 N

(c) 50,000 N

(d) 5 N

10. A rubber suction cup sticks firmly to a smooth wall because:

(a) of glue on the cup

(b) of gravity

(c) of magnetic force

(d) the outside air pressure is greater than the pressure inside after the air is squeezed out

11. A girl weighing 450 N stands on both feet. Each foot has an area of 150 cm². The pressure on the ground is:

(a) 3,000 Pa

(b) 7,500 Pa

(c) 15,000 Pa

(d) 30,000 Pa

12. A block placed on a face of area 0.02 m² exerts a pressure of 4,000 Pa on the floor. The weight of the block is:

(a) 80 N

(b) 320 N

(c) 20 N

(d) 8 N

13. We cannot drink through a straw that has a hole above the liquid level because:

(a) gravity increases

(b) air enters through the hole and the pressure inside the straw does not fall below the outside pressure

(c) of friction

(d) the straw gets blocked

14. A glass filled to the brim with water is covered with a card and turned upside down. The card stays in place and the water does not spill. This is because of:

(a) magnetic force

(b) friction between the card and the glass

(c) gravity holding the water

(d) atmospheric pressure pushing the card upward

15. Two metal hemispheres were joined and the air inside was pumped out. Teams of horses could not pull them apart because:

(a) of magnetic attraction

(b) of glue

(c) atmospheric pressure outside pushes the two halves together

(d) of gravity

16. A camel walks easily on desert sand because its feet:

(a) are lighter than other animals’ feet

(b) are broad, so the pressure on the sand is small

(c) are on hard ground

(d) are sticky

17. A cart moves at constant speed on a straight road. The engine pushes it forward with 500 N and friction acts backward with 500 N. Which statement is correct?

(a) The net force is 1,000 N forward

(b) The cart speeds up

(c) The cart stops at once

(d) The net force is zero and the speed stays constant

18. At a given depth inside a liquid, the pressure is:

(a) greatest downward

(b) greatest upward

(c) the same in all directions

(d) zero sideways

19. Which changes will increase the pressure exerted by a block on a table?

(i) Increasing the weight, keeping the area the same

(ii) Decreasing the area of contact, keeping the weight the same

(iii) Increasing the area of contact, keeping the weight the same

(iv) Decreasing the weight, keeping the area the same

(a) (i) and (ii)

(b) (i) and (iii)

(c) (ii) and (iv)

(d) (iii) and (iv)

20. When more air is pumped into a football, the pressure inside it increases because:

(a) air becomes heavier

(b) more air particles hit the inner walls more often

(c) gravity increases

(d) the ball becomes hot

Answers and Solutions

Keep Practicing

Try the other practice sets for this chapter:

• Force and Pressure MCQs Class 8: 20 Easy Questions + Answers
• Essential Force and Pressure MCQs for Class 8 Olympiad

Found a mistake or want more chapters? Leave a comment below and we will update this post.

The post Mastering Force and Pressure: 20 Challenging MCQs with Solutions first appeared on Winner Science.

Every question comes with the correct answer and a short solution at the end, so you can check your understanding straight away.

Quick Revision: Key Points

• Force is a push or a pull. Its SI unit is the newton (N).
• A force can change the speed, the direction of motion or the shape of an object. It cannot change the mass.
• Contact forces: muscular force and friction. Non-contact forces: gravitational, magnetic and electrostatic forces.
• Pressure = force ÷ area. Its SI unit is the pascal (Pa), where 1 Pa = 1 N/m².
• For the same force, a smaller area gives more pressure and a larger area gives less pressure.
• Liquids exert pressure on the bottom and walls of the container, and the pressure increases with depth.
• Gases exert pressure on the walls of their container in all directions.
• Atmospheric pressure is caused by the weight of the air above us, and it decreases as we go higher.

How to use this set: attempt all 20 MCQs without looking at the answers. Then check the answer key. Scoring 18-20 means you know the chapter well; 14-17 is good; below 14 means it is worth revising the points above and trying again.

Practice Questions: 20 Easy MCQs

1. A push or a pull on an object is called:

(a) energy

(b) work

(c) power

(d) force

2. The unit of force is named after:

(a) Galileo

(b) Isaac Newton

(c) Blaise Pascal

(d) Albert Einstein

3. Which of the following is a contact force?

(a) Gravitational force

(b) Magnetic force

(c) Muscular force

(d) Electrostatic force

4. Which of the following is a non-contact force?

(a) Gravitational force

(b) Muscular force

(c) Frictional force

(d) Force of a push

5. A football lying at rest starts moving when it is kicked. The force has changed its:

(a) shape

(b) mass

(c) state of motion

(d) colour

6. When we press a rubber ball, the force changes its:

(a) mass

(b) shape

(c) colour

(d) density

7. Two forces of equal size act on an object in opposite directions along the same line. These forces are called:

(a) balanced forces

(b) unbalanced forces

(c) contact forces

(d) gravitational forces

8. The force acting per unit area is called:

(a) energy

(b) speed

(c) weight

(d) pressure

9. If the force stays the same but the area is doubled, the pressure becomes:

(a) double

(b) half

(c) the same

(d) four times

10. One pascal is equal to:

(a) 1 N·m²

(b) 1 kg/m²

(c) 1 N/m²

(d) 1 m²/N

11. Liquids exert pressure on:

(a) only the bottom of the container

(b) only the top surface

(c) only the walls of the container

(d) the bottom and the walls of the container

12. Gases exert pressure:

(a) only on the bottom of the container

(b) only on the lid

(c) on the walls of the container in all directions

(d) nowhere

13. The pressure exerted by the layer of air around the Earth is called:

(a) liquid pressure

(b) atmospheric pressure

(c) muscular pressure

(d) frictional pressure

14. We do not feel the atmospheric pressure because:

(a) it is zero

(b) it is balanced by the pressure inside our body

(c) air has no weight

(d) we are used to gravity

15. Objects fall towards the ground because of:

(a) magnetic force

(b) friction

(c) gravitational force

(d) muscular force

16. A comb rubbed with dry hair attracts small pieces of paper. The force acting is:

(a) electrostatic force

(b) magnetic force

(c) muscular force

(d) gravitational force

17. When a bullock pulls a cart, the force used is:

(a) magnetic force

(b) muscular force

(c) gravitational force

(d) electrostatic force

18. School bags have wide straps in order to:

(a) increase the pressure on the shoulders

(b) reduce the weight of the bag

(c) reduce the pressure on the shoulders

(d) make the bag look good

19. A drawing pin has a pointed tip in order to:

(a) make it lighter

(b) make it look neat

(c) reduce friction

(d) exert a large pressure at the tip

20. The wall of a dam is made thicker at the bottom because:

(a) water at the top is heavier

(b) water pressure increases with depth

(c) it looks better

(d) it costs less

Answers and Solutions

Keep Practising

Try the other practice sets for this chapter:

• Force and Pressure Class 8: 20 Challenging MCQs with Solutions
• Essential Force and Pressure MCQs for Class 8 Olympiad

Found a mistake or want more chapters? Leave a comment below and we will update this post.

The post Force and Pressure MCQs Class 8: 20 Easy Questions + Answers first appeared on Winner Science.