homework Various x vs. t graphs are shown on the right. Graph(s) indicating cons
ID: 2140754 • Letter: H
Question
homework
Various x vs. t graphs are shown on the right. Graph(s) indicating constant velocity is(are) _____. Graph(s) indicating positive velocity is(are) _____. Graph(s) indicating negative velocity is(are) _____. Graph(s) indicating changing velocity is(are) _____. For the x vs. t graph on the right describe how you would walk to produce this graph. Your description should include your velocity over time intervals, e. g., 0 to 2 seconds. A graph of position vs. time for a dazed cyclist is shown. At what time(s) is the cyclist: moving with the greatest velocity? not moving, i.e., has zero velocity? moving with positive velocity? Consider the velocity vs. time graph on the right. The acceleration is zero for line(s) _____. The acceleration is positive for line(s) _____. The acceleration is negative for line(s) _____. The acceleration is increasing for line(s) _____. For the v vs. t graph, specify the time interval(s) where the acceleration is: zero _____. positive _____. negative _____. changing _____.Explanation / Answer
1)
constant v is a,c and d
positive v is d
negative v is a and b
changing is b
2)
walk forward at 0.5 m/s for 2 seconds
stay still for 2 seconds
walk backwards at 1m/s for 2 seconds
then walk forwards at 0.5 m/s for 2 seconds
3)
a) greatest v is biggest slope so 3 seconds
b) 2 and 4 seconds
c) moving with pos velocity from 2 to 4 seconds
4)
accel is zero for c
positive for a and d
negative for b
increasing for d
5)
a) 4 to 6
b) positive 0 to 2 and 6 to 8
c) negative 2 to 4
d) changing 2 to 4 and 6 to 8
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