What is Force?
A Force is simply something that pushes or pulls. Without
forces nothing in the universe would happen. Flicking a Marble creates a force that
sends the marble rolling across the table. Putting out your hand to stop it
falling off the table’s edge creates a force that sends it spinning in another
direction. If the marble rolls off the table, gravity pulls it to the ground –
another force, of course
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| Types Of Force |
How many types of force are there?
There are four types of. They are:
1. Muscular
force: The force used to push or pull an object with the help of our muscles is
called muscular force.
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| Muscular Force |
2. Frictional
force: The force resisting the relative motion of solid surfaces, fluid layers,
and material elements sliding against each other is called Frictional force.
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| Frictional Force |
3. Gravitational
force:
The force attracted by the earth all objects towards itself is called gravitational
force.
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| Gravitational Force |
4. Magnetic
force: The force attracted by a magnet to some objects is called magnetic force.
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| Magnetic Force |
The story of apple falling in Newton's head:
One day Sir Issac Newton Gone outside to picnic And then he sat Under a
apple tree. He wrote His book and then he ate his lunch under the apple tree.
Then he ate and he slept under the apple tree. One apple had fallen in his head.
Then he think "How did the apple fallen on my head''. So,he thrown the fallen
apple three times and then he discovered that the apple had fallen on his head
because of gravitational force.
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| Apple falling on Newton's head |
What are the three laws of motion?
Newton’s 1st law of motion: An object at rest will
remain at rest unless acted on by an unbalanced force. An object in motion
continues in motion with the same speed and in the same direction unless acted
upon by an unbalanced force. This law is often called “The law of inertia". Inertia is the tendency of all objects to resist changes in their motion. The larger is the mass, the more it resists changes.
Newton’s 2nd law of motion:The acceleration of an object depends on the mass of the object and the amount of force applied.
F = M A
Newton’s 3rd law of motion: Whenever a force acts, an equal force acts in the opposite
directions.
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| Newton's cradle |
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