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7Sci Chapter 17 Sec1

Matter In Motion - Measuring Motion

QuestionAnswer
A driver of an SUV drives past a jogger on the subdivision walking path. Relative to the jogger, the SUV is traveling 15 m/s. What is the reference point in this situation? the jogger
The hands of a clock relative to the numbers on a clock or the speed of a bicycle relative to the direction of travel. Which of the following most closely illustrates motion by relating it to a reference point? The hands of a clock relative to the numbers on a clock
What are two factors that determine speed? distance and time
What is the difference between speed and velocity? One has direction, and the other does not
What best represents acceleration as presented on a graph? velocity change vs. time
What is an object that appears to stay in place that helps you detect motion in another object? a reference point
What do you need to know to calculate an object's acceleration? starting velocity
How do you calculate average speed? divide the total distance traveled by the total time
What is the difference between speed and velocity? velocity has direction, while speed does not
A hiker's velocity begins at 1.8 m/s uphill and changes to 1.5 m/s uphill. How do you know the hiker has a negative acceleration? his speed decreased
What is an object that appears to stay in place that helps you detect motion in another object? a reference point
What do you need to know to calculate an object's acceleration? starting velocity, final velocity, and time it takes to change velocity
What would you call a building if you compared it with a moving student? a reference point
When something changes position, what is it doing? It is moving
What two things does speed depend on? distance and time
What is the SI unit for speed? m/s
What is motion? Any change in position over time
What is the speed of an object in a particular direction? velocity
Your speed is not changing, but your direction is changing. What are you still doing? accelerating
What is the driver's velocity if a driver's acceleration is positive? increasing
What distinguishes the measurement of speed from that of velocity and acceleration? speed does not involve direction, but both velocity and acceleration do
What is centripetal acceleration? acceleration that occurs in a circular motion
Created by: ndmsteach