Speed of a car The accompanying figure shows the time-to- distance graph for a sports car accelerating from a standstill. P 650 600 500 E 400 300 200 100 5 10 15 20 Elapsed time (sec) a. Estimate the slopes of secant lines PQ,, PQ2, PQ3, and PQ4, arranging them in order in a table like the one in Figure 2.6. What are the appropriate units for these slopes? b. Then estimate the car's speed at time t = 20 sec. Distance (m)

Glencoe Physics: Principles and Problems, Student Edition
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Author:Paul W. Zitzewitz
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Chapter2: Representing Motion
Section: Chapter Questions
Problem 67A
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Speed of a car The accompanying figure shows the time-to-
distance graph for a sports car accelerating from a standstill.
P
650
600
500
E 400
300
200
100
5
10
15
20
Elapsed time (sec)
a. Estimate the slopes of secant lines PQ,, PQ2, PQ3, and PQ4,
arranging them in order in a table like the one in Figure 2.6.
What are the appropriate units for these slopes?
b. Then estimate the car's speed at time t = 20 sec.
Distance (m)
Transcribed Image Text:Speed of a car The accompanying figure shows the time-to- distance graph for a sports car accelerating from a standstill. P 650 600 500 E 400 300 200 100 5 10 15 20 Elapsed time (sec) a. Estimate the slopes of secant lines PQ,, PQ2, PQ3, and PQ4, arranging them in order in a table like the one in Figure 2.6. What are the appropriate units for these slopes? b. Then estimate the car's speed at time t = 20 sec. Distance (m)
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