Describe the role of gravitation in supporting life on earth
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Gravitational Force :
You must have observed that a ripe fruit falls off a tree and falls straight to the ground.
A ball dropped by a child from a balcony falls to the ground. So, there must have been some force which acts on these objects due to which the objects fall towards the ground. This is the force of gravity.
The Force with which the earth attracts all objects towards itself is called " Gravitational force" or "Force of gravity".
All objects , when let go down, fall freely towards the ground. The earth's gravity stops objects from going up.
When a ball is dropped from a height , it's speed goes on increasing. The speed of a falling ball ( or any other falling body ) increases because the earth applies a pulling force on it which is called the " Force of Gravity".
On the other hand, when a ball is thrown upwards, then it's speed goes on descreasing . this is because the Earth applies a pulling force of gravity on the ball in the downward direction (opposite to the motion of the ball).
The Force of Gravity depends on the mass of object and their distances from each other. objects with larger mass have a larger force.
Therefore, an object with more mass will have more weight. The force by which earth attracts a body is called the " Weight of the body on the Earth".
The Gravitational force was first discovered by Issac Newton when he saw an apple falling from a tree.
We measure weight with a device known as spring balance. Mass of a body is measured in kilograms whereas weight is measured in Newton's or kilogram force (kgf) or kilogram weight (kgw).
Distance between object and the earth also affects gravitational Force. Space craft moves beyond the Earth's Gravitational force. While a ball thrown high in air comes back to the earth.
In space, all heavenly bodies like the moon, the planets and the stars exert force of attraction on objects. The bigger and heavier the body is, the greater is it's force of gravity. Gravitational force exerted by moon on an object is less than the gravitational Force exerted by earth on the same object.
The gravitational Force plays an important role in nature :-
1.) All the planets revolve around the sun due to the Gravitational force between the sun and planets. The force required by a planet to move around the sun in elliptical path known as centripetal force is provided by the gravitational Force of attraction between the planet and the sun.
Thus, gravitational Force is responsible for the existence of the solar system.
2.) Artificial Satellites revolve around the earth due to the Gravitational force between the earth and the satellite.
3.) Rainfall and snow fall is possible only due to Gravitational force of the earth.
4.) We stay on the Earth due to the Gravitational force between the earth and us.
5.) Tides in oceans are found due to the Gravitational force between the moon and the water in oceans.
You must have observed that a ripe fruit falls off a tree and falls straight to the ground.
A ball dropped by a child from a balcony falls to the ground. So, there must have been some force which acts on these objects due to which the objects fall towards the ground. This is the force of gravity.
The Force with which the earth attracts all objects towards itself is called " Gravitational force" or "Force of gravity".
All objects , when let go down, fall freely towards the ground. The earth's gravity stops objects from going up.
When a ball is dropped from a height , it's speed goes on increasing. The speed of a falling ball ( or any other falling body ) increases because the earth applies a pulling force on it which is called the " Force of Gravity".
On the other hand, when a ball is thrown upwards, then it's speed goes on descreasing . this is because the Earth applies a pulling force of gravity on the ball in the downward direction (opposite to the motion of the ball).
The Force of Gravity depends on the mass of object and their distances from each other. objects with larger mass have a larger force.
Therefore, an object with more mass will have more weight. The force by which earth attracts a body is called the " Weight of the body on the Earth".
The Gravitational force was first discovered by Issac Newton when he saw an apple falling from a tree.
We measure weight with a device known as spring balance. Mass of a body is measured in kilograms whereas weight is measured in Newton's or kilogram force (kgf) or kilogram weight (kgw).
Distance between object and the earth also affects gravitational Force. Space craft moves beyond the Earth's Gravitational force. While a ball thrown high in air comes back to the earth.
In space, all heavenly bodies like the moon, the planets and the stars exert force of attraction on objects. The bigger and heavier the body is, the greater is it's force of gravity. Gravitational force exerted by moon on an object is less than the gravitational Force exerted by earth on the same object.
The gravitational Force plays an important role in nature :-
1.) All the planets revolve around the sun due to the Gravitational force between the sun and planets. The force required by a planet to move around the sun in elliptical path known as centripetal force is provided by the gravitational Force of attraction between the planet and the sun.
Thus, gravitational Force is responsible for the existence of the solar system.
2.) Artificial Satellites revolve around the earth due to the Gravitational force between the earth and the satellite.
3.) Rainfall and snow fall is possible only due to Gravitational force of the earth.
4.) We stay on the Earth due to the Gravitational force between the earth and us.
5.) Tides in oceans are found due to the Gravitational force between the moon and the water in oceans.
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abhi178:
Nice answer
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Answer :- Fallowing is the role of gravitation on supporting life on earth.
1. There is also gravitational attraction between you and the teacher's table. But this force is too small to cause a motion in you or the table.
2. When children play with ball , when they throw ball upwards..then it is fall vertically downwards due to gravitational force.
3. Gravitational force is the force which acts on all bodies on the earth at all times. It is equal to the weight of a body and always directed towards the center of the earth.
Explanation:
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