The x-acceleration is ..... zero at 58 sec. The speed is ..... zero at 26 sec. T
ID: 1587087 • Letter: T
Question
The x-acceleration is ..... zero at 58 sec.
The speed is ..... zero at 26 sec.
The x-acceleration is ..... zero at 26 sec .
At 48 sec, the speed is as high as it gets.
The acceleration magnitude at 37 sec is ..... the acceleration magnitude at 15 sec.
The speed at 4 sec is ..... the speed at 70 sec.
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.
Options are:
True
False
Less Than
Greater than
Equal To
Explanation / Answer
we can write the following inferences as
The velocity is slope of the graph, and the acceleration is the non-zero when the slope changes.
at different times , the variation of acceleration and velocities are
From 0 to 15s the car is moving at a constant velocity.
From 15-18s the car decelerates to zero velocity.
From 18-35s the car is stop, velocity=0.
From 35-40s the car accelerates to a positive velocity
From 40-57s the car maintains this constant velocity
From 57-61s the decelerates to a slower positive velocity,After 61s the car remain at this slow velocity
from above information
The x-acceleration is ...>.. zero at 58 sec.(greater than ) slope is low but its positive so >0
The speed is ...=.. zero at 26 sec.(equal to zero ) slope is zero.
The x-acceleration is ..=... zero at 26 sec .
At 48 sec, the speed is as high as it gets. TRUE, from 40 - 57 s slope is high and same.
The acceleration magnitude at 37 sec is ..>... the acceleration magnitude at 15 sec.(at 37 car accelerating at 15 s decelerating)
The speed at 4 sec is ...>.. the speed at 70 sec. slope at 70 s is less than at 4 s.
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