I need help, I only have one try left and I do not know what is wrong with my an
ID: 1636195 • Letter: I
Question
I need help, I only have one try left and I do not know what is wrong with my answers.
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 uniformly. Select the appropriate choice for each statement.
The speed at 76 sec is ..... the speed at 48 sec. (less than)
The x-acceleration is ..... zero at 15 sec. (equal to)
The acceleration magnitude at 15 sec is ..... the acceleration magnitude at 38 sec. (equal to)
The speed is ..... zero at 23 sec. (equal to)
The x-acceleration is ..... zero at 23 sec . (equal to)
At 76 sec, the speed is as high as it gets. (false)
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 uniformly. Select the appropriate choice for each statement 1000 E 800 600 400 200 20 80 Time (s) Less thanThe speed at 76 sec is... the speed at 48 sec Eaual to Equal to The acceleration magnitude at 15 sec is.. the acceleration magnitude at 38 sec. Eaual toThe speed is.... zero at 23 sec Equal to The x-acceleration is zero at 23 sec The x-acceleration is zero at 15 sec. FalseAt 76 sec, the speed is as high as it gets By extrapolating the straight sections of the graph, you can estimate the time during which the speed is changing. This, with the change in speed, should let you estimate the magnitude of the acceleration Submit Answer Incorrect. Tries 11/12 Previous TriesExplanation / Answer
It should be (c) The acceleration magnitude at 15 sec is less than the acceleration magnitude at 38 seconds.
because as we see the slope at 15 seconds is less than the slope at 38 seconds.