Official Class 8 Science Worksheets: Chapter 11 Force and Pressure
Explore structured practice materials through the CBSE Class 8 Science Force and Pressure Moment and Atmospheric Pressure Worksheet Set 03. Tailored for Class 8 learners, utilizing these Science worksheets ensures thorough preparation and strengthens problem-solving accuracy before final school evaluations.
Solved Practice Worksheets for Science
View or download the dedicated CBSE Class 8 Science Force and Pressure Moment and Atmospheric Pressure Worksheet Set 03 resource below. Engaging with these practice papers under focused study conditions ensures continuous academic progress and mastery of the 2026-27 curriculum for Chapter 11 Force and Pressure.
A. Check Point
1. The mechanism of a crane. 2. The mechanism of a hammer.
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Answer: A crane has a long horizontal arm (jib) that turns about a pivot. The effort at one end balances the load at the other end, and the moment of effort equals the moment of load. A hammer's claw is used to remove nails: the nail is pulled by pushing the handle, which acts at a long distance from the pivot, so a small effort gives a large turning effect.
Teacher's Note: Use the key term in your answer.
3. A cock stands 5 m from the pivot with weight 10 N. Find the moment. 4. A dog of weight 30 N stands 4 m from the pivot. Find the moment.
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Answer: Moment = force x perpendicular distance. 3. 10 x 5 = 50 N m. 4. 30 x 4 = 120 N m.
Teacher's Note: Give an example if the question allows.
3. B1. Calculate the pressure when 200 N acts on (a) 10 square metres (b) 5 square metres.
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Answer: Pressure = force / area. (a) 200 / 10 = 20 Pa. (b) 200 / 5 = 40 Pa.
Teacher's Note: Write a short, clear answer.
4. B2. Force on 0.5 square metres to give 500 Pa. B3. Pressure of 30 N on 2 square metres. B4. Force on a piston of area 0.5 square metres at 300 Pa.
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Answer: B2. Force = pressure x area = 500 x 0.5 = 250 N. B3. 30 / 2 = 15 Pa. B4. 300 x 0.5 = 150 N.
Teacher's Note: Remember this for your exam.
5. C1. Explain pressure and its applications. C2. Why do dams have a broad base?
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Answer: Pressure is the force acting per unit area: P = F / A, and it is measured in pascals (N per square metre). Applications: sharp knives and nails cut and pierce easily because of a small area, and wide tyres and straps of bags reduce pressure because of a large area. Dams have a broad base because the water pressure rises with depth, so the bottom needs to be very strong to withstand it.
Teacher's Note: Learn this point and write it in your own words.
6. D1. Pressure exerted by liquids and its applications.
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Answer: A liquid exerts pressure in all directions, and the pressure increases with depth and density. At the same depth the pressure is the same. Applications: water tanks are placed on a height to get a good flow, dams are thick at the base, and deep-sea divers wear special suits.
Teacher's Note: Use the key term in your answer.
7. Keywords: moment, moment of force, balancing moments, pressure, atmosphere, atmospheric pressure, barometer.
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Answer: Moment (of force): the turning effect of a force about a point, equal to force x perpendicular distance. Balancing moments: when the clockwise moment equals the anticlockwise moment, there is no turning. Pressure: force per unit area. Atmosphere: the layer of gases around the earth. Atmospheric pressure: the pressure exerted by the weight of the air. Barometer: an instrument to measure atmospheric pressure.
Teacher's Note: Give an example if the question allows.
B. Exercise
8. MCQs (i)-(x).
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Answer: (i) (c) both (a) and (b); (ii) (b) pressure decreases with depth; (iii) (b) thrust; (iv) (c) both; (v) (b) thrust; (vi) (d) both (a) and (b); (vii) (b) liquid; (viii) (c) barometer; (ix) (a) solid; (x) (b) decrease.
Teacher's Note: Write a short, clear answer.
9. Fill in the blanks (1-9).
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Answer: 1. moment; 2. see-saw; 3. Pressure (for a fixed area); 4. earth; 5. air molecules; 6. 1000 km (the atmosphere thins out gradually); 7. atmospheric (outside); 8. force; 9. Galileo.
Teacher's Note: Item 3: pressure is proportional to force for a constant area.
10. True or False (1-10).
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Answer: 1. False: it balances when they are equal. 2. True. 3. True. 4. False: the unit of force is the newton (Pascal is the unit of pressure). 5. False: both exert pressure in all directions. 6. False: at the same depth the pressure is the same. 7. False: pressure decreases when the area increases. 8. True. 9. False: humans do experience air pressure but are balanced by internal pressure. 10. True.
Teacher's Note: Learn this point and write it in your own words.
11. Match the columns.
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Answer:
| Column I | Column II |
|---|---|
| 1. Unit of moment | g. Newton-metre |
| 2. Crane | e. Used to move heavy objects |
| 3. Jib | f. Horizontal arm to lift heavy objects |
| 4. Unit of pressure | c. Newton per square metre |
| 5. Fluids | j. Gases and liquids |
| 6. Pivot | a. A fixed point |
| 7. Evangelista Torricelli | i. Constructed the simplest barometer |
| 8. Effort force | b. Acts at a longer perpendicular distance |
| 9. Moment of effort | h. Equal to the moment of load |
| 10. Hammer | d. Used to break things |
Teacher's Note: Use the key term in your answer.
C. Long Answers
1. The turning effect of force and factors affecting it.
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Answer: A force can turn an object about a fixed point (pivot), as when we open a door. The turning effect (moment) depends on the size of the force and the perpendicular distance of the force from the pivot. A larger force or a longer distance gives a bigger turning effect.
Teacher's Note: Give an example if the question allows.
2. Balancing effect, with a see-saw.
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Answer: On a see-saw, a person on the left gives an anticlockwise moment and a person on the right gives a clockwise moment. It balances when the two moments are equal, so a heavier person sits nearer the pivot and a lighter person farther away.
Teacher's Note: Write a short, clear answer.
3. Two holes at different heights in a bottle of water. 4. A glass of water with an index card turned upside down.
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Answer: Water from the lower hole flows out farther and faster because the pressure increases with depth. The card does not fall because the atmospheric pressure acting upwards on the card is greater than the weight of the water pushing down.
Teacher's Note: Remember this for your exam.
5. Characteristics of liquid pressure. 6. A note on atmospheric pressure.
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Answer: Liquid pressure acts in all directions, increases with depth and density, and is the same at the same depth. Atmospheric pressure is the pressure of the weight of the air above us. It is about 101,000 Pa at sea level, decreases with altitude and is measured with a barometer. We do not feel it because our body's internal pressure balances it.
Teacher's Note: Learn this point and write it in your own words.
16. D1. Force needed to speed up a scooter of mass 560 kg.
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Answer: The acceleration is missing from the question, so use F = m x a with the given value. For example, at 2 m per second squared, F = 560 x 2 = 1,120 N.
Teacher's Note: The acceleration is not given in the printed question; this is an example.
17. D2. Force for a cycle of mass 60 kg at 2 m per second squared. D3. Mass of a vehicle accelerated at 4 m per second squared by 80 N. D4. Force on a book cover of 0.025 square metres at 5,000 Pa.
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Answer: D2. F = ma = 60 x 2 = 120 N. D3. m = F / a = 80 / 4 = 20 kg. D4. F = pressure x area = 5,000 x 0.025 = 125 N.
Teacher's Note: Give an example if the question allows.
Free study material for Science
CBSE Class 8 Science Worksheets for Chapter 11 Force and Pressure
Practice Exercises for Class 8 Science Chapter 11 Force and Pressure
Explore reliable practice questions for Chapter 11 Force and Pressure tailored for Class 8 Science learners. Use these structured worksheets to evaluate exam preparedness and strengthen problem-solving skills throughout the 2026 academic session.
Step-by-Step Solutions and Practice Guidelines
Built using official NCERT guidelines for Class 8 Science, these practice sheets provide reliable academic support. Cross-reference your completed work with our detailed solutions to learn standard answer-writing formats for CBSE exams.
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Consistent engagement with these exercises builds familiarity with recurring exam themes. If specific areas within Chapter 11 Force and Pressure cause trouble, utilize our dedicated NCERT solutions for Class 8 Science to clear up doubts immediately.
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