til AT&T; 11:00 AM ¢ loncapa2.physics.sc.edu Contents HW1Notes Bookmark Evaluate
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til AT&T; 11:00 AM ¢ loncapa2.physics.sc.edu Contents HW1Notes Bookmark Evaluate communicate -Print Info A car travels a certain distance along a straight road (in the +x direction). The distance the car travels as a function of time is shown in the figure below. When the car changes speed it does so uniformlv. Select the appropriate choice for each statement. The x-acceleration is.... zero at 58 sec. The speed is... zero at 23 sec. The acceleration magnitude at 36 sec is. the acceleration magnitude at 15 sec. The speed at 48 sec is... the speed at 70 sec. At 70 sec, the speed is as high as it gets which the speed is sections of the in speed, you can estimate the time changing. This, with the Genau·Incorrect. Tries 1/12 Previous Tries uhsingetheg fromh abovco.ca tculate the average speed of the car for he period from 0 to 60.0 s Tries 0/12 This discussion is closed. Send FeedbackExplanation / Answer
slope of d vs t curve will give us velocity.
and slope of velocity vs t curve will acceleration.
if curve of d vs t for a time interval then acceleration will be zero.
1. at 58 sec, slope of d vs t curve change hence acceleratio will be no zero.
Not zero at 58 sec
2. at 50 sec, d vs t curve is straight line hence a = 0
3. at 23, slope of d vs t curve is zero.
hence v = 0
4. at 36, slope change hence speed decreases.()negative acc.
at 15 sec, a = 0
so at 36 acceleration is less than acc. at 15 sec.
5. slope at 70 deg is greater than at 70 sec
so speed will be greater.
6. false : at 70 sec speed is not highest (as slope is not highest)
7. v_average = distance / time
= (1000 - 0) / (60 - 0)
= 16.7 m/s
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