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Standard IX

Physics

Third Law of Motion

An apple fall...

Question

An apple falls from a tree because of gravitational attraction between the earth and apple. If $F_{1}$ is the magnitude of force exerted by the earth on the apple and $F_{2}$ is the magnitude of force exerted by apple on earth, then

F_{1}

is very much greater than

F_{2}

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F_{2}

is very much greater than

F_{1}

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F_{1}

is only a little greater than

F_{2}

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F_{1}

and

F_{2}

are equal

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Solution

The correct option is D $F_{1}$ and $F_{2}$ are equal
According to Newton's III law "Every action has an equal and an opposite reaction". An apple falling down has the force of gravity acting downward ( $F_{1}$ ) which is the action. The opposite reaction is the force the apple exerts on the earth ( $F_{2}$ ).

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An apple falls from a tree because of gravitational attraction between the earth and apple. If

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is the magnitude of force exerted by the earth on the apple and

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is very much greater than

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(b)

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An apple falls from a tree because of gravitational attraction between the earth and apple. If F1 is the magnitude of force exerted by the earth on the apple and F2 is the magnitude of force exerted by apple on earth, then

The correct option is D F1 and F2 are equalAccording to Newton's III law "Every action has an equal and an opposite reaction". An apple falling down has the force of gravity acting downward (F1) which is the action. The opposite reaction is the force the apple exerts on the earth (F2).

An apple falls from a tree because of gravitational attraction between the earth and apple. If $F_{1}$ is the magnitude of force exerted by the earth on the apple and $F_{2}$ is the magnitude of force exerted by apple on earth, then