a) What is friction? Write their types.
b)Write advantages and disadvantages of friction.
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Answers
Answer:
A) Friction is the resistance to motion of one object moving relative to another. It is not a fundamental force, like gravity or electromagnetism. Instead, scientists believe it is the result of the electromagnetic attraction between charged particles in two touching surfaces. There are two main types of friction, static friction and kinetic friction. Static friction operates between two surfaces that aren't moving relative to each other, while kinetic friction acts between objects in motion.
Explanation:
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Answer:
A.) Friction is the force resisting the relative motion of solid surfaces, fluid layers, and material elements sliding against each other.
There are 2 main types of friction they are:
a.) Static friction
b.) Kinetic friction
B.) Advantages of friction:
1. Friction helps us to walk on the ground
2. We can write on a paper or on a board due to friction
3. Friction helps in stopping a vehicle on applying the brakes.
4. It helps in generating heat when we rub our hands together
5. Asteroids burn in the atmosphere before reaching the earth due to friction and saves lives on earth.
Disadvantages of friction:
1. Friction produces a lot of heat in various parts of the machinery and this leads to wastage of energy as heat
2. Opposes motion, hence more energy is needed to overcome friction
3. Noise production in machines is irritating as well as leads to energy loss
4. Forest fires are caused due to friction between branches of trees
5. Lot of effort and money goes in using techniques like greasing and oiling to overcome friction and usual wear and tear caused by it
Explanation:
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