Podcast
Questions and Answers
What is a tangent?
What is a tangent?
A tangent is a line that touches a circle or curve at only one point.
What is gravitational force?
What is gravitational force?
The force of attraction between two objects is called gravitational force.
Which of these statements about gravitational force are true? (Select all that apply)
Which of these statements about gravitational force are true? (Select all that apply)
The force of gravity acts between all objects with mass.
The force of gravity acts between all objects with mass.
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What is acceleration due to gravity?
What is acceleration due to gravity?
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What is the approximate value of acceleration due to gravity on Earth?
What is the approximate value of acceleration due to gravity on Earth?
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Acceleration due to gravity depends on the mass of the falling object.
Acceleration due to gravity depends on the mass of the falling object.
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What is weight?
What is weight?
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Weight is a constant value and does not change with location.
Weight is a constant value and does not change with location.
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An object's weight on the moon is the same as its weight on Earth.
An object's weight on the moon is the same as its weight on Earth.
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What is Kepler's First Law of Planetary Motion?
What is Kepler's First Law of Planetary Motion?
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What is Kepler's Second Law of Planetary Motion?
What is Kepler's Second Law of Planetary Motion?
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What is mass?
What is mass?
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Mass changes with location.
Mass changes with location.
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What are the common units for measuring mass?
What are the common units for measuring mass?
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How can mass be determined?
How can mass be determined?
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Kepler's Laws of Planetary Motion describe the:
Kepler's Laws of Planetary Motion describe the:
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The acceleration due to gravity is the same on all planets.
The acceleration due to gravity is the same on all planets.
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The weight of an object is the same in all locations.
The weight of an object is the same in all locations.
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Which of these is NOT a factor that affects the force of gravity between two objects?
Which of these is NOT a factor that affects the force of gravity between two objects?
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The acceleration due to gravity is greater at the equator than at the poles.
The acceleration due to gravity is greater at the equator than at the poles.
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The force of attraction between two objects is called ______
The force of attraction between two objects is called ______
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______ is a measure of the amount of matter in an object.
______ is a measure of the amount of matter in an object.
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The line joining a planet to the sun sweeps out equal areas in equal ______ according to Kepler's Second Law.
The line joining a planet to the sun sweeps out equal areas in equal ______ according to Kepler's Second Law.
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The ______ of the orbital period of a planet is proportional to the cube of its mean distance from the sun according to Kepler's Third Law.
The ______ of the orbital period of a planet is proportional to the cube of its mean distance from the sun according to Kepler's Third Law.
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Match the following terms with their descriptions:
Match the following terms with their descriptions:
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A tangent line can intersect a circle at more than one point.
A tangent line can intersect a circle at more than one point.
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The force of gravity is always attractive.
The force of gravity is always attractive.
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The acceleration due to gravity on the moon is greater than the acceleration due to gravity on Earth.
The acceleration due to gravity on the moon is greater than the acceleration due to gravity on Earth.
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Weight is a measure of the amount of matter in an object.
Weight is a measure of the amount of matter in an object.
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Mass can be measured in Newtons.
Mass can be measured in Newtons.
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Kepler's Laws of Planetary Motion were formulated before Newton's Law of Universal Gravitation.
Kepler's Laws of Planetary Motion were formulated before Newton's Law of Universal Gravitation.
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The Earth's shape is a perfect sphere.
The Earth's shape is a perfect sphere.
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Study Notes
Tangent
- A tangent is a line that touches a circle or curve at only one point.
Universal Law of Gravitation
- The force of attraction between two objects is called gravitational force.
- The force acts between the centers of mass of the two objects.
- The force is directly proportional to the product of their masses.
- The force is inversely proportional to the square of the distance between their centers.
Acceleration Due to Gravity
- If an object falls towards Earth, the only force acting on it is gravity.
- Acceleration due to gravity is the rate of change of velocity of the object.
- Acceleration due to gravity on Earth is approximately 9.8 m/s².
- Acceleration due to gravity doesn't depend on the mass of the object, only the mass of the Earth.
Weight
- Weight is a force that is equal to the mass of an object multiplied by the acceleration due to gravity.
- Weight is affected by gravity, so an object will weigh less on the moon than on Earth.
- Weight is greater at the poles and less at the equator due to the Earth's shape.
Kepler's Laws of Planetary Motion
- First Law (Law of Ellipses): Planets revolve around the sun in elliptical orbits with the sun at one of the foci.
- Second Law (Law of Areas): The line joining a planet to the sun sweeps out equal areas in equal intervals of time.
- Third Law (Law of Periods): The square of the orbital period of a planet is proportional to the cube of its mean distance from the sun.
Mass
- Mass is a fundamental property of matter which is a measure of its inertia.
- Mass is a constant and does not change with location or gravity.
- Mass is measured in kilograms (kg) and pounds (lbs).
- Mass can be determined by dividing the weight of an object by the acceleration due to gravity.
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Description
Explore key concepts in physics related to gravity and motion, including tangents, the universal law of gravitation, and acceleration due to gravity. This quiz will test your understanding of how weight is influenced by gravitational force. Dive into the fundamental principles that govern the motion of objects in our universe.
