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Questions and Answers
What are the effects of a force acting on an object?
What are the effects of a force acting on an object?
- It can change the speed of the object (correct)
- It can change the direction of the object (correct)
- It can change both speed and direction of the object (correct)
- None of the above
What types of forces are you familiar with?
What types of forces are you familiar with?
- Gravitational Force (correct)
- Frictional Force (correct)
- Electromagnetic Force (correct)
- All of the above
What do you know about the gravitational force and it acts not only between two objects on the earth but also between any two objects in the universe?
What do you know about the gravitational force and it acts not only between two objects on the earth but also between any two objects in the universe?
The gravitational force is a universal force that acts between any two objects with mass. The force of gravity is proportional to the mass of each object and decreases with the square of the distance between them, meaning the farther apart the objects are, the weaker the gravitational force.
How was this force discovered?
How was this force discovered?
The earth must be attracting the apple on the tree to the center of the earth, this attractive force must be directed towards the center of the earth.
The earth must be attracting the apple on the tree to the center of the earth, this attractive force must be directed towards the center of the earth.
What are Newton's laws of motion?
What are Newton's laws of motion?
What is the concept of the gravitational force and the gravitational force between the earth and the moon?
What is the concept of the gravitational force and the gravitational force between the earth and the moon?
The figure shows the gravitational force between the earth and the moon. The figure are not according to scale.
The figure shows the gravitational force between the earth and the moon. The figure are not according to scale.
Newton thought that gravitation acts on apples at different heights from the surface of the earth. It can also act on objects at even greater heights, much farther away from the earth, like for example, the moon. Can it act on even farther objects like the Sun?
Newton thought that gravitation acts on apples at different heights from the surface of the earth. It can also act on objects at even greater heights, much farther away from the earth, like for example, the moon. Can it act on even farther objects like the Sun?
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Study Notes
Gravitation
- Gravitation is a universal force, meaning it affects all objects in the universe
- It's not only between objects on Earth, but also between any two objects
- Newton discovered gravitation through observing an apple falling from a tree
- The apple fell vertically downwards, not at an angle
- Newton concluded Earth's attractive force pulls the apple towards its center
- This force is directed vertically downwards
- Figure 1.1 illustrates an apple's gravitational force towards Earth's center
- This force is perpendicular to Earth's surface
- Newton also considered gravitational force between Earth and Moon, although the scale in diagrams may not be accurate
- Gravitation applies to objects at different heights above Earth
- It also applies to objects further away, like the Moon, other planets, and the Sun
Concept of Gravitation
- The gravitational force acts between the Earth and Moon
- It's a force of attraction, pulling objects towards the center of Earth
- This concept relates to the apple falling vertically downwards
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