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Questions and Answers
What is the definition of mass?
What is the definition of mass?
- The amount of matter in an object. (correct)
- The downward force acting on an object due to gravity.
- The speed at which an object falls.
- The resistance to acceleration.
Which unit is commonly used to measure mass?
Which unit is commonly used to measure mass?
- Grams (correct)
- Pounds
- Newtons
- Meters per second squared
Does an object's mass change depending on its location (e.g., Earth vs. Mars)?
Does an object's mass change depending on its location (e.g., Earth vs. Mars)?
- No, mass remains constant regardless of location. (correct)
- Yes, mass increases where gravity is stronger.
- Mass can change sign depending on location
- Yes, mass decreases where gravity is weaker.
What is the definition of weight?
What is the definition of weight?
Which unit is commonly used to measure weight?
Which unit is commonly used to measure weight?
Does an object's weight change depending on its location?
Does an object's weight change depending on its location?
If a person weighs 200 lbs on Earth, would they weigh the same on Mars?
If a person weighs 200 lbs on Earth, would they weigh the same on Mars?
What is the relationship between mass and weight?
What is the relationship between mass and weight?
What is the acceleration due to gravity on Earth?
What is the acceleration due to gravity on Earth?
The formula $f=ma$ shows the relationship between force, mass, and what else?
The formula $f=ma$ shows the relationship between force, mass, and what else?
What is mass?
What is mass?
What is weight?
What is weight?
A person's mass on Mars compared to their mass on Earth would be:
A person's mass on Mars compared to their mass on Earth would be:
A person's weight on Mars compared to their weight on Earth would be:
A person's weight on Mars compared to their weight on Earth would be:
Which of the following is true?
Which of the following is true?
Flashcards
Mass
Mass
The amount of matter in an object, measured in grams.
Weight
Weight
The downward force on an object due to gravity, measured in Newtons.
What is mass?
What is mass?
The amount of matter in an object.
What is weight?
What is weight?
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Mass and Weight
Mass and Weight
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Newton's Second Law
Newton's Second Law
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Earth's gravity
Earth's gravity
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Mass vs. Weight
Mass vs. Weight
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Mass vs Weight
Mass vs Weight
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Study Notes
- Mass and weight are related but distinct quantities in science.
Mass
- Mass is the amount of matter in an object determined by the number of protons, neutrons, and electrons it contains.
- Mass remains constant regardless of location (Earth, Mars, or outer space).
- Grams are the standard unit for measuring mass.
Weight
- Weight measures the downward force on an object due to gravity.
- Weight relies on an object's mass, and the pull of gravity.
- Weight varies depending on location due to differing gravitational forces.
- Newtons are the standard unit for measuring weight.
- Individuals weighing 200 lbs on Earth will have a different weight on Mars, but mass remains constant.
Confusion Factors
- Everyday language uses "mass" and "weight" interchangeably, which is scientifically inaccurate.
- On Earth, mass and weight are proportional due to relatively consistent gravitational acceleration.
- Both mass and weight can be measured in pounds in the English system confusingly.
- Scales measure force but can be calibrated to display mass in grams due to Earth's constant gravity.
Relationship Between Mass and Weight
- Mass is a property, whereas weight is a force.
- Newton's second law of motion explains the relationship using the formula f = ma (force equals mass times acceleration).
- Force and mass are proportional if acceleration is known.
- On Earth, acceleration (a) due to gravity is approximately 9.8 m/s per second, enabling the calculation of weight from mass and vice versa.
Key Implications
- Force depends on acceleration; mass does not.
- Mass is an inherent, unchanging quantity unless matter is added or removed from the object.
- Weight is not an inherent quantity; it changes with variations in gravity/acceleration.
- A 200 lbs person on Earth would weigh only 75 lbs on Mars due to the different gravitational acceleration.
Weight on Different Planets
- Mercury: 76 lbs.
- Venus: 181 lbs.
- Earth: 200 lbs.
- Mars: 75 lbs.
- Jupiter: 506 lbs.
- Saturn: 213 lbs.
- Uranus: 178 lbs.
- Neptune: 225 lbs.
- Weight varies by planet; mass does not.
- Weight is dependent on gravity, whereas mass remains constant.
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