Questionchoose the letter that best answers the question or completes the statement.
1. Motion is described with respect to a
b. displacement.
c. slope.
d. frame of reference.
2. Displacement is distance combined with
a. direction.
b. speed.
c. velocity.
d. magnitude.
3. Displacement vectors of 3 m and 5 m in the same direction combine to make a displacement vector that is
a. 2 m .
b. 0 m .
c. 8 m .
d. 15 m .
4. Average speed is the total distance divided by the
a. average distance.
b. average acceleration.
c. total time.
d. slope.
5. The slope of a distance-time graph is equal to the
a. speed.
b. acceleration.
c. displacement.
d. motion.
6. Velocity is
10. The rate at which velocity is changing at a given instant is described by
(4)Text)
assessment at PHSchool.com
me
a. instantaneous acceleration.
b. average speed.
c. constant speed.
d. vector addition.
Understanding Concepts
11. Why is it necessary to choose a single frame reference when measuring motion?
12. For what kinds of distances would you choos make measurements in millimeters? In kilom
13. Light from a star travels to Earth in a straig line at a constant speed of almost 300,000 What is the acceleration of the light?
14. If two displacement vectors add to yield displacement of zero, what do you know the two displacements?
15. How will the total distance traveled by in 2 hours be affected if the average sp is doubled?
16. How do you know that a speedomete you the instantaneous speed of a car?
17. On a distance-time graph, what wou curve describing constant speed look
18. A spider is crawling on a wall. First it 1 meter up, then 1 meter to the left 1 meter down. What is its total disp
19. A jogger travels 8.0 kilometers in 1 What is the jogger's average spees
20. You see a lightning bolt in the sky clap of thunder 3 seconds later. travels at a speed of was the lightning? (Hint: Assum lightning instantly.)
7. Two or more velocities can be combined by
a. graphing the slope.
b. using vector addition.
c. calculating the instantaneous speed.
d. determining the rate.
8. A ball just dropped is an example of
a. constant speed.
b. instantaneous speed.
c. combining displacements.
d. free fall.
9. Acceleration is equal to
a. distance divided by time.
b. change in speed divided by time.
c. the slope of a distance-time graph.
d. change in speed multiplied by time.
Studdy Solution
Select the correct answer for Question 10.
- The correct answer is: a. instantaneous acceleration.
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