1. Newton conjectured that the force attracting an apple to Earth and the moon in its orbit was the same: gravity. He proposed that this gravitational force diminishes with the square of the distance between the objects.

    Newton conjectured that the force attracting an apple to Earth and the moon in its orbit was the same: gravity. He proposed that this gravitational force diminishes with the square of the distance between the objects.

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  2. After observing the apple fall, Newton considered whether the same force that caused the apple to fall to the ground also governed the moon’s orbit around the Earth, leading him to investigate gravity further.

    After observing the apple fall, Newton considered whether the same force that caused the apple to fall to the ground also governed the moon’s orbit around the Earth, leading him to investigate gravity further.

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  3. Isaac Newton was inspired to think about gravitational force after observing an apple fall from a tree, leading him to wonder if the same force that pulled the apple to the ground also influenced the moon's orbit.

    Isaac Newton was inspired to think about gravitational force after observing an apple fall from a tree, leading him to wonder if the same force that pulled the apple to the ground also influenced the moon’s orbit.

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  4. Gravitational force causes an object dropped from a height to accelerate toward the Earth's surface, increasing its velocity as it falls until it either reaches terminal velocity or impacts the ground.

    Gravitational force causes an object dropped from a height to accelerate toward the Earth’s surface, increasing its velocity as it falls until it either reaches terminal velocity or impacts the ground.

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  5. For the moon to orbit the Earth and for planets to orbit the Sun, a gravitational force must be present, providing the necessary centripetal force to maintain their elliptical orbits and prevent them from moving in a straight line.

    For the moon to orbit the Earth and for planets to orbit the Sun, a gravitational force must be present, providing the necessary centripetal force to maintain their elliptical orbits and prevent them from moving in a straight line.

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