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Thread: Gravitational Force and Energy .......

  1. #1 Gravitational Force and Energy ....... 
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    Hey! The gravitational force of the earth causes objects to fall downwards. Therefore, the earth exerts a force on an object at a height known as the gravitational force, and when that object is let to fall freely due to gravity, a displacement occurs.
    Moreover the displacement and force are in the same direction.
    Therefore, the gravitational force of the earth does some work on the object. I have studied that "an object that can do work is said to possess energy. Also, an object that does work loses energy and the object on which work is done acquires energy."

    1) Well, according to this, the object that is under free fall must acquire energy, which it does (which is maybe kinetic energy)

    2) But according to the other side of the statement, the object which does work must also lose energy. So does the earth lose energy due to this work done? How? Or does it not? Please explain.....
    Thanks in advance!
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  2. #2  
    Member Janus's Avatar
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    Quote Originally Posted by Gaurav(-26.7) View Post
    Hey! The gravitational force of the earth causes objects to fall downwards. Therefore, the earth exerts a force on an object at a height known as the gravitational force, and when that object is let to fall freely due to gravity, a displacement occurs.
    Moreover the displacement and force are in the same direction.
    Therefore, the gravitational force of the earth does some work on the object. I have studied that "an object that can do work is said to possess energy. Also, an object that does work loses energy and the object on which work is done acquires energy."

    1) Well, according to this, the object that is under free fall must acquire energy, which it does (which is maybe kinetic energy)

    2) But according to the other side of the statement, the object which does work must also lose energy. So does the earth lose energy due to this work done? How? Or does it not? Please explain.....
    Thanks in advance!
    The object in free fall does not gain energy, it converts energy from one form to another, potential energy to kinetic energy. Its total energy remains constant.
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