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Questions and Answers
What is weight a measure of?
What is weight a measure of?
- The force acting on an object due to gravity. (correct)
- The gravitational field strength.
- The speed of an object as it falls.
- The amount of matter an object contains.
Which of the following factors directly influences the strength of an object's gravitational field?
Which of the following factors directly influences the strength of an object's gravitational field?
- The object's mass. (correct)
- The object's temperature.
- The object's volume.
- The object's color.
What unit is used to measure gravitational field strength?
What unit is used to measure gravitational field strength?
- Kilograms (kg).
- Newtons (N).
- Meters per second squared (m/s²).
- Newtons per kilogram (N/kg). (correct)
Why do astronauts on the International Space Station appear weightless despite being within Earth's gravitational field?
Why do astronauts on the International Space Station appear weightless despite being within Earth's gravitational field?
What is the approximate weight of a 10kg object on Earth, given Earth's gravitational field strength is 9.8 N/kg?
What is the approximate weight of a 10kg object on Earth, given Earth's gravitational field strength is 9.8 N/kg?
An object weighs 100 N on Earth. Knowing that the gravitational field strength on the Moon is approximately 1.6 N/kg, and on Earth it's 9.8 N/kg, what would be the approximate weight of the same object on the Moon?
An object weighs 100 N on Earth. Knowing that the gravitational field strength on the Moon is approximately 1.6 N/kg, and on Earth it's 9.8 N/kg, what would be the approximate weight of the same object on the Moon?
If an object has a mass of $m$ and is located at a point where the gravitational field strength is $g$, which of the following correctly expresses the relationship to find its weight, $W$?
If an object has a mass of $m$ and is located at a point where the gravitational field strength is $g$, which of the following correctly expresses the relationship to find its weight, $W$?
Which of the following statements accurately describes the concept of weight as a non-contact force?
Which of the following statements accurately describes the concept of weight as a non-contact force?
A hypothetical planet, Xylo, has a gravitational field strength of 15 N/kg. If an object weighs 600 N on Xylo, what would be its approximate weight on Earth, assuming Earth's gravitational field strength is 9.8 N/kg?
A hypothetical planet, Xylo, has a gravitational field strength of 15 N/kg. If an object weighs 600 N on Xylo, what would be its approximate weight on Earth, assuming Earth's gravitational field strength is 9.8 N/kg?
Planet Q has half the radius of Earth and twice the mass. What is the approximate gravitational field strength on Planet Q, relative to that of Earth (g)? (Assume Earth's gravitational field strength is 9.8 N/kg)
Planet Q has half the radius of Earth and twice the mass. What is the approximate gravitational field strength on Planet Q, relative to that of Earth (g)? (Assume Earth's gravitational field strength is 9.8 N/kg)
Flashcards
Weight
Weight
The force experienced by an object with mass in a gravitational field.
Mass
Mass
The amount of matter an object contains, measured in kilograms (kg) or grams (g).
Non-contact forces
Non-contact forces
Forces that act between objects without physical contact.
Gravitational field strength (g)
Gravitational field strength (g)
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Gravitational Field Source
Gravitational Field Source
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Apparent Weightlessness in Space
Apparent Weightlessness in Space
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Study Notes
- Gravity is one of the most important forces.
- Weight is the force experienced by an object with mass in a gravitational field.
- Objects with mass produce a gravitational field.
- The more mass an object has, the greater its gravitational field.
- Weight is the force acting on an object due to gravity and is measured in newtons (N).
- Weight acts towards the center of a gravitational field.
- A calibrated spring-balance, or Newton meter, can measure weight.
- Weight is a non-contact force because gravity exerts force through a field.
- Objects do not need to be touching the Earth to have weight.
- Gravitational field strength (g) is measured in newtons per kilogram (N/kg).
- Earth's gravitational field strength is 9.8 N/kg, meaning each kg of mass experiences 9.8 N of force.
- In weaker gravitational fields, the weight of an object is smaller.
- The gravitational field strength of the Moon is 1.6 N/kg, meaning each kg of mass experiences 1.6 N of force.
- Astronauts weigh less on the Moon than on Earth.
- Astronauts on the International Space Station appear weightless, but they still have weight because they are within Earth's gravitational field.
- Astronauts seem weightless because they and the space station are constantly falling towards Earth.
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