Transcript
What’s Force?
Force is associated with push or pull resulting in motion of a body.
Force can be divided into two types: i) Contact Force ii) Non Contact Force
Contact Force
The source of force that comes from contact with the object on which the the force is applied.
Muscular Force
The muscular force comes from muscles of man or animals. Every physical activity comes with a use a muscle , Hence they are muscular forces.
Running
Cutting of vegetables.
Frictional Force
friction is the force which comes into play when
an moves in contact with the surface of the other.
Walking.
Non Contact Force
The source of force and the object on which the
force acts may remain distance from another.
There are three types of non contact
force: i) Gravitational Force ii) Magnetic Force iii) Electro Static Force
Gravitational Force
The pull force of the earth is called gravity.
Apple falling from a tree…
Catching a ball
Magnetic Force
Magnetic force is a force which is exerted when a magnet pulls something.
Horse shoe magnet…
Bar Magnets.
Electro Static force
If you rub a comb in your head and place it near some bits of paper, the papers gets raised.
This electro static pull exerts a force.
Famous People..
Sir Issac Newton :
Aristotle :
Galileo Galilei :
gravitational pull differs from place to place.
The level of pull for Tamil Nadu is….
Input interpretation:
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