Gravity, Centripetal Acceleration, Centripetal Force

What is gravity?

• Gravity is the force that repels objects away from a planet's center.

• Gravity is the force by which a planet or other body draws objects toward its center.

• Gravity is the force that causes objects to float in space.

• Gravity is the force that only affects objects on Earth.

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Explain how centripetal acceleration is related to circular motion.

• Centripetal acceleration is the acceleration that causes an object to move in a straight line.

• Centripetal acceleration is the acceleration directed towards the center of a circular path, necessary to keep an object moving in a circular motion.

• Centripetal acceleration is the acceleration that is not required for circular motion.

• Centripetal acceleration is the acceleration directed away from the center of a circular path.

What is the formula for centripetal acceleration?

• a = v^2 / r

• a = v + r

• a = v * r

• a = r / v

How does centripetal force keep an object moving in a circular path?

• By reducing the object's mass to keep it in motion.

• By applying a force in the opposite direction of the object's motion.

• By continuously changing the direction of the object's velocity without changing its speed.

• By increasing the object's speed as it moves in a circular path.

Describe the relationship between centripetal force and centripetal acceleration.

• Centripetal force and centripetal acceleration are inversely proportional to each other.

• Centripetal acceleration is not affected by centripetal force.

• Centripetal force and centripetal acceleration are directly proportional to each other.

• Centripetal force causes centripetal acceleration to decrease.

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What are the units of measurement for centripetal acceleration?

• km/h^2

• m/s^2

• cm/s^2

• miles/h^2

How does gravity affect the motion of objects in space?

• Gravity causes objects in space to move in a straight line.

• Gravity pushes objects away from massive bodies in space.

• Gravity pulls objects towards massive bodies, causing them to orbit or fall towards the center of gravity.

• Gravity has no effect on the motion of objects in space.

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Explain the difference between centripetal force and centrifugal force.

• Centrifugal force acts towards the center of rotation

• Centripetal force acts towards the center of rotation, while centrifugal force acts outward from the center of rotation.

• Centripetal force acts outward from the center of rotation

• Centripetal force is the same as centrifugal force

How does the mass of an object affect the force of gravity acting on it?

• The force of gravity decreases as the mass of an object increases

• The force of gravity increases exponentially with the mass of an object

• The mass of an object directly affects the force of gravity acting on it.

• The mass of an object has no impact on the force of gravity

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Discuss the role of gravity in keeping planets in orbit around the sun.

• The rotation of planets around their axis maintains their orbit

• Planets are kept in orbit by solar wind

• Magnetic force is the primary factor in planet orbit

• Gravity is the force that keeps planets in orbit around the sun.

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