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During which period(s) is the object traveling in a positive direction? During w

ID: 2121851 • Letter: D

Question

During which period(s) is the object traveling in a positive direction?

During which period(s) is the object traveling in a nega

tive direction?

During which period(s) the object at rest?

During which period(s) is it traveling at constant velocity?

During which period(s) does it experience positive acceleration?

During which period(s) does it experience negative acceleration?

what are the magnitudes of the above accelerations?

Draw a plot of the acceleration vs. time for this object using Figure 7.

Explanation / Answer

1 to 9 secs

9 to 15 secs

7 to 9 secs

2 to 4,7 to 9, 10 to 12

0 to 2 and 12 to 15

4 to 7 and 9 to 10

magnitudes for 4 to 7 is -2, for 0 to 2 is 3, for 9 to 10 is -6, for 12 to 15 is 3

graph of acceleration will be[ x=3 for x=0 to 2 then 0 for x=2 to 5 then x= -2 for 4 to 7 then for 7 to 9 is x=0 then for 9 to 10 is x=-6 then for 10 to 12 is x=0 then for 12 to 15 is x=3