Question

Hint: Recall that speed is distance/time 2. [2pt] 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 Select the appropriate choice for each statement: T-True, F-Palse, G-Greater than, L-Less than, -Equal to. If the first is the second is Gund the rest etter 1000 Distance Die la A) The X-acceleration is ..... zero at 70 sec B) The speed is.... zero at 23 sec. C) The X-acceleration is..... zero at 37 see. D) At 70 sec, the speed is as high as it gets. E) The acceleration magnitude at 37 sec is ... the acceleration magnitude at 15 sec F) The speed at 70 see is ... the speed at 4 sec. Submit Al AS e mpi Answer: Mot yet correct, tries 16/40 Hint 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 ext
someone answered this previously but it was incorrect they had TTFTEL

Answer 1

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A) After roughly extrapolating at time=60s and time=80s, the speed comes out to be the same. Also since the slope is linear you can say that acceleration is equal to 0.

B) Speed continuously decreases as you can see. S₁= 300/20, S₂=300/30. So, speed is still greater than zero.

C) The graph seems to be increasing again at t=37s. So here acceleration is greater than 0.

D) After t= 60s, the graph is linear till t=80s, meaning the speed is the same and does not increase further.

E) At t=0, acceleration is zero and at t=37s acceleration is slightly greater than 0.

F) From the slope of the graph, it is clear that speed at 70sec is less than the speed at 4sec because the slope is higher in the range t=0 to t=20s meaning higher speed than the speed in the range t=60s to t=80s.