Answer the following questions
1) Write a short note about liquid pressure
2) On the basis of interaction what are the two categories of forces?
3)Name some non-contact forces
4) Write a short note about atmospheric pressure
Class 8
Science (NCERT)
Chapter 11
Forces and pressure
Answers
1. Fluid pressure is a measurement of the force per unit area. Fluid pressure can be caused by gravity, acceleration, or forces in a closed container. Since a fluid has no definite shape, its pressure applies in all directions. ... In a fluid column, as the depth increases, the pressure increases as well.
2. Basically, there are two types of forces, contact forces, and non contact forces
3. Gravity force.
Magnetic force.
Electric force.
4. Atmospheric pressure is a force in an area pushed against a surface by the weight of the atmosphere of Earth, a layer of air. ... This is because high places do not have as much air above them, pushing down. Barometers can be used to measure atmospheric pressure. There is the same atmospheric pressure from all directions.
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