Multiple Choice
2.1 Relative Motion, Distance, and Displacement
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a description of motion depends on the reference frame
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motion appears the same in all reference frames
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reference frames affect the motion of an object
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you can see motion better from certain reference frames
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It is always equal to the distance the object moved between its initial and final positions.
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It is both the straight line distance the object moved as well as the direction of its motion.
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It is the direction the object moved between its initial and final positions.
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It is the straight line distance the object moved between its initial and final positions.
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130 miles
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30 miles east
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30 miles west
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Cannot be determined from the information given
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Yes, there is a single, correct frame of reference because motion is a relative term.
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Yes, there is a single, correct frame of reference which is in terms of Earth’s position.
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No, there is not a single, correct frame of reference because motion is a relative term.
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No, there is not a single, correct frame of reference because motion is independent of frame of reference.
If a space shuttle orbits Earth once, what is the shuttle’s distance traveled and displacement?
- Distance and displacement both are zero.
- Distance is circumference of the circular orbit while displacement is zero.
- Distance is zero while the displacement is circumference of the circular orbit.
- Distance and displacement both are equal to circumference of the circular orbit.
2.2 Speed and Velocity
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Cyclist 1
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Cyclist 2
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Cyclist 3
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Cyclist 4
A car travels with an average speed of 23 m/s for 82 s. Which of the following could NOT have been the car's displacement?
- 1,700 m east
- 2,000 m west
- 1,600 m north
- 1,500 m south
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She rode the same amount of time and a different distance each day.
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She rode for different amounts of time and distance each day.
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She rode the same distance and the same amount of time each day.
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She rode the same distance but different amounts of time each day.
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Average velocity is zero.
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The magnitude of average velocity is equal to the average speed.
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The magnitude of average velocity is greater than the average speed.
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The magnitude of average velocity is less than the average speed.
2.3 Position vs. Time Graphs
What is the slope of a straight line graph of position vs. time?
- Velocity
- Displacement
- Distance
- Acceleration
Using the graph, what is the runner’s velocity from 4 to 10 s?
- –3 m/s
- 0 m/s
- 1.2 m/s
- 3 m/s
2.4 Velocity vs. Time Graphs
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The rate of acceleration of the car.
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The area enclosed by the car’s trip.
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The car’s displacement during the 10 s.
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The velocity of the car at t = 10 s.
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75\,\text{m}
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130\,\text{m}
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150\,\text{m}
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cannot be determined from the information given