What is Gravity? Flashcards

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What is gravity?

Gravity is an invisible force that attracts objects towards each other, becoming very noticeable with large masses like planets.

Why do all planets in our solar system orbit the Sun?

Planets orbit the Sun due to the force of gravity.

How does weight differ from mass?

Mass is the amount of matter in an object and doesn’t change, while weight is a force that depends on gravity and can change.

What happens to a person in space regarding gravity?

In space, a person becomes weightless and floats because they are outside Earth’s gravitational pull.

What is air resistance and how does it affect falling objects?

Air resistance is an upward force of friction that opposes gravity and slows down falling objects. It increases with the object’s surface area.

How do an apple and a feather fall differently on Earth and in a vacuum?

On Earth, air resistance causes the feather to fall more slowly than the apple. In a vacuum, without air resistance, both would fall at the same rate and reach the ground at the same time.

Revision Notes
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