Newton's Law of Universal Gravitation

Front

What is Newton's Law of Universal Gravitation?

Back

It states that every point mass attracts every other point mass in the universe with a force that is directly proportional to the product of their masses and inversely proportional to the square of the distance between their centers.

Front

Why do you weigh less on the moon than on Earth?

Back

Because the moon has less gravitational pull due to its smaller mass.

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What is the formula for calculating the gravitational force between two objects?

Back

F = GMm/d², where F is the gravitational force, G is the gravitational constant, M and m are the masses of the two objects, and d is the distance between their centers.

Front

What does the gravitational constant (G) represent?

Back

It is a proportionality constant used in the equation of Newton's Law of Universal Gravitation, approximately equal to 6.674 × 10⁻¹¹ N(m/kg)².

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How does mass affect the force of gravity?

Back

The force of gravity is directly proportional to the mass of the objects; as mass increases, the gravitational force increases.

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What is the relationship between distance and gravitational force?

Back

The gravitational force is inversely proportional to the square of the distance between the centers of two masses; as distance increases, the gravitational force decreases.

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What is 'apparent weight'?

Back

It is the weight that a person feels, which can differ from their actual weight due to acceleration or other forces acting on them.

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What is the significance of the term 'universal' in Newton's Law of Universal Gravitation?

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It indicates that the law applies to all objects with mass, regardless of their size or location in the universe.

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How does gravity affect objects in free fall?

Back

In free fall, all objects accelerate towards the Earth at the same rate (approximately 9.81 m/s²) regardless of their mass.

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What is the effect of gravity on tides?

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Tides are caused by the gravitational pull of the moon and the sun on Earth's oceans.