The kinetic energy A person needs energy to do any work (work). For example, when a person pushes a swing, the chemical energy stored in his body i…
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The work The physical meaning of work differs from its meaning in everyday life. Work in physics does not mean doing strenuous mental or physical w…
Importance of satellites A satellite is a tall tower that can be used to send and receive radio waves . Satellites can be divided into many types …
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The satellites Space exploration has been a dream that has haunted human minds for centuries. Achieving this dream involved the development of moni…
The circular motion and The centripetal acceleration By studying Newton's second law, you learned that: When a force acts on a moving object i…
The gravitational field The law of universal gravitation states that the gravitational force between two material bodies is inversely proportional …
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Law of universal gravitation The universe is in constant motion. For example: -The moon revolves around the earth -The planets revolve around the …