How muscular force differ from mechanical force?
Define friction. What are its advantages and disadvantages?
Answers
Explanation:
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Answer:
Explanation:
The force cause by acting of muscle in our body when two interacting bodies are in direct physical contact with each other is called Muscular Force. Mechanical force is an energy that requires a medium for it to travel. When this force is applied on an object, it can cause it to bend, scratch it, or break the object.
Friction is the force that resists motion when the surface of one object comes in contact with the surface of another.
Advantages of friction:
Friction enables us to walk freely.
It helps to support ladder against wall.
It becomes possible to transfer one form of energy to another.
Objects can be piled up without slipping.
Breaks of vehicles work due to friction.
Disadvantages of friction:
1.It always resists the motion, so extra energy is required to overcome it.
2.It causes wear and tear of machines.
3.It decreases the life expectancy of moving parts of vehicles.
4.Since friction is very useful in some cases while harmful in some cases, friction is called a necessary evil.