Questions and Answers
Independent variables are represented on the horizontal line known as the ______, while dependent variables are on the vertical line known as the y-axis.
x-axis
Variance measures the squared ______ of each number in the set from the mean.
deviation
Work is a ______ quantity.
scalar
Systematic errors result from the measuring instrument or the design of the ______.
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The accepted SI unit in speed and ______ is meter per second.
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Acceleration measures the rate of change in ______ with respect to time.
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Uniform motion involves changing velocity and non-zero acceleration.
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Random errors result from predictable changes occurring during data measurement.
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Vector quantities have both a magnitude and a direction.
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Displacement is the longest distance between the initial and final positions.
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Study Notes
Graphical Representation
- Independent variables are plotted on the x-axis (horizontal), while dependent variables are on the y-axis (vertical).
- A graph serves as a 2-D visual tool to illustrate the relationship between these variables.
Motion and Measurement
- Acceleration indicates how velocity changes over time.
- Velocity is defined as the displacement of an object within a specific time frame.
- Displacement refers to the shortest path between the initial and final positions of an object.
Errors in Measurement
- Random errors are unpredictable fluctuations that occur during data collection.
- Systematic errors are due to flaws in measurement tools or experimental design, affecting overall accuracy.
- Error is the difference between measured values and expected values.
- Variance quantifies how much each number in a data set deviates from the mean.
- Accuracy reflects how close a measurement is to the actual value, while precision indicates the consistency of repeated measurements.
Motion Characteristics
- Uniform motion is characterized by constant velocity and zero acceleration; an example is the rotation and revolution of the Earth.
Measurement Concepts
- Work is categorized as a scalar quantity, possessing only magnitude and no direction.
- Measurement involves assigning numerical values to physical properties of an object, using established standards for comparison.
Vectors
- A vector is a physical quantity with both magnitude and direction, essential in motion analysis.
- The component method for computing vectors includes calculating sine in the y-components.
- The standard SI unit for both speed and velocity is meter per second (m/s).
Graphical Representation
- Independent variables are plotted on the x-axis (horizontal), while dependent variables are on the y-axis (vertical).
- A graph serves as a 2-D visual tool to illustrate the relationship between these variables.
Motion and Measurement
- Acceleration indicates how velocity changes over time.
- Velocity is defined as the displacement of an object within a specific time frame.
- Displacement refers to the shortest path between the initial and final positions of an object.
Errors in Measurement
- Random errors are unpredictable fluctuations that occur during data collection.
- Systematic errors are due to flaws in measurement tools or experimental design, affecting overall accuracy.
- Error is the difference between measured values and expected values.
- Variance quantifies how much each number in a data set deviates from the mean.
- Accuracy reflects how close a measurement is to the actual value, while precision indicates the consistency of repeated measurements.
Motion Characteristics
- Uniform motion is characterized by constant velocity and zero acceleration; an example is the rotation and revolution of the Earth.
Measurement Concepts
- Work is categorized as a scalar quantity, possessing only magnitude and no direction.
- Measurement involves assigning numerical values to physical properties of an object, using established standards for comparison.
Vectors
- A vector is a physical quantity with both magnitude and direction, essential in motion analysis.
- The component method for computing vectors includes calculating sine in the y-components.
- The standard SI unit for both speed and velocity is meter per second (m/s).
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Description
This quiz covers fundamental concepts in physics, focusing on the relationships between independent and dependent variables represented in graphs. You'll explore concepts such as acceleration and velocity, as well as the impact of random errors in measurements. Test your understanding of graphical representations in physics!
