Chapters
Chapter 2: Health and Diseases
Chapter 3: Force and Pressure
Chapter 4: Current Electricity and Magnetism
Chapter 5: Inside the Atom
Chapter 6: Composition of Matter
Chapter 7: Metals and Nonmetals
Chapter 8: Pollution
Chapter 9: Disaster Management
Chapter 10: Cell and Cell Organelles
Chapter 11: Human Body and Organ System
Chapter 12: Introduction to Acid and Base
Chapter 13: Chemical Change and Chemical Bond
Chapter 14: Measurement and Effects of Heat
Chapter 15: Sound
Chapter 16: Reflection of Light
Chapter 17: Man made Materials
Chapter 18: Ecosystems
Chapter 19: Life Cycle of Stars
Chapter 3: Force and Pressure
Balbharati solutions for General Science 8th Standard Maharashtra State Board Chapter 3 Force and Pressure Exercise [Page 22]
The SI unit of force is_________.
Dyne
Newton
Joule
The air pressure on our body is equal to __________ pressure.
Atmospheric
sea bottom
space
For a given object, the buoyant force in liquids of different ________ is__________. (the same, density, different, area)
The SI unit of pressure is_______.
N/m3
N/m2
kg/m2
pa/m2
Make a match
| A group | B group |
| 1. Fluid | a. Higher pressure |
| 2. Blunt knife | b. Atmospheric pressure |
| 3. sharp needle | c. Specific gravity |
| 4. Relative density | d. Lower pressure |
| 5. Hecto pascal | e. Same pressure in all directions |
A plastic cube is released in water. Will it sink of come to the surface of the water?
Why do the load-carrying heavy vehicles have a large number of wheels?
How much pressure do we carry on our heads? why don't we feel it?
Why does it happen?
A ship dips to a larger depth in fresh water as compared to marine water.
Why does it happen?
Fruits can easily be cut with a sharp knife.
Why does it happen?
The wall of a dam is broad at its base.
Why does it happen?
If a stationary bus suddenly speeds up, passengers are thrown in the backward direction.
Complete the following tables.
| Mass(Kg) | Volume (m3) | Density(kg/m3) |
| 350 | 175 | - |
| - | 190 | 4 |
| Density of Metal (kg/m3) | Density of water (kg/m3) | Relative Density |
| 103 | 5 | |
| 8.5 × 103 | 103 | - |
| weight(N) | Area (m2) | Pressure(Nm−2) |
| - | 0.04 | 20,000 |
| 1500 | 500 | - |
The density of metal is 10.8 × 103 kg/m3. Find the relative density of the metal.
Volume of an object is 20 cm3 and the mass in 50 g. Density of water is 1 g cm-3 . Will the object float on water or sink in Water?
The volume of a plastic covered sealed box is 350 cm3 and the box has a mass 500 g. Will the box float on water or sink in water? what will be the mass of water displaced by the box?
Chapter 3: Force and Pressure
Balbharati solutions for General Science 8th Standard Maharashtra State Board chapter 3 - Force and Pressure
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Concepts covered in General Science 8th Standard Maharashtra State Board chapter 3 Force and Pressure are Balanced and Unbalanced Forces, Pressure on Solids, Liquid Pressure, Archemedes Principle, Buoyancy Force (Upthrust Force), Types of Force: Non-Contact Force.
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