CC 7 The Gravity of the Situation

What is the scientific definition of mass?

• How much space an object occupies.

• How much an object weighs.

• How much an object resists changes in its motion.

• How much an object attracts other objects.

How does the distance between two objects affect the force of gravity between them?

• The force of gravity increases with the square of the distance.

• The force of gravity weakens with the square of the distance.

• The force of gravity is directly proportional to the distance.

• Distance has no effect on the force of gravity.

What is the fundamental concept behind an object being in orbit around a planet?

• The object is constantly being propelled by engines to stay in motion.

• The object is falling towards the planet but has enough sideways motion to continuously miss it.

• The object is in a state of weightlessness, where gravity has no effect.

• The object is moving in a straight line through space, unaffected by the planet's gravity.

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What happens if an object is thrown away from a planet at a speed greater than its escape velocity?

• It will eventually fall back to the planet.

• It will enter a circular orbit around the planet.

• It will move away from the planet forever without falling back.

• It will immediately stop moving due to lack of gravity.

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Why are astronauts on the International Space Station (ISS) considered weightless?

• They are too far from Earth for gravity to affect them.

• The ISS is moving at a constant speed, canceling out gravity.

• They are continuously falling around Earth, preventing them from feeling their weight.

• The ISS generates its own artificial gravity, which counteracts Earth's pull.