Podcast
Questions and Answers
Which statement correctly defines a scalar quantity?
Which statement correctly defines a scalar quantity?
- It can change with time.
- It has both magnitude and direction.
- It is derived from fundamental quantities.
- It has only magnitude. (correct)
What is the relationship between velocity and displacement?
What is the relationship between velocity and displacement?
- Displacement can vary independently of velocity.
- Velocity is the speed in a specific direction. (correct)
- Velocity does not depend on time.
- Displacement is always equal to velocity.
How do you calculate acceleration?
How do you calculate acceleration?
- You add the initial speed to the final speed.
- You subtract the final speed from the initial speed and divide by time. (correct)
- You multiply the mass by the change in velocity.
- You divide the change in distance by time.
Which equation correctly summarizes the relationship of force?
Which equation correctly summarizes the relationship of force?
To convert grams to kilograms, which operation is performed?
To convert grams to kilograms, which operation is performed?
Flashcards
Physical Quantity
Physical Quantity
A measurable property of an object or phenomenon, compared to a standard reference using specific units.
Fundamental Quantity
Fundamental Quantity
A physical quantity that is independent of other physical quantities.
Vector Quantity
Vector Quantity
A physical quantity that has both magnitude and direction.
Velocity
Velocity
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Density
Density
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Study Notes
Physical Quantities
- Physical quantity is comparing quantities using a standard reference, measured in specific units.
- Quantities are classified as fundamental (independent) or derived (dependent on fundamental quantities).
Scalar vs. Vector Quantities
- Scalar quantities have only magnitude.
- Vector quantities have both magnitude and direction.
Displacement and Velocity
- Displacement considers the shortest path between points.
- Velocity is speed in a specific direction.
- Velocity = Displacement / Time
Acceleration
- Acceleration = (change in velocity) / time
- Calculate acceleration by subtracting the initial velocity from the final velocity and dividing by the time.
Force, Mass, and Acceleration
- Force = Mass x Acceleration
Density
- Density = Mass / Volume
Unit Conversions
- To convert grams to kilograms, divide by 1000.
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