Answer
For (a) and (c), see the figure below.
(b) A car coasts at a speed of 20 mi/h when the driver noticed a traffic light station, so he slows the car down to stop exactly at the line. And when he just stopped the light converted to green so he speeds up again from rest. If you know that the accelerations of slowing down and speeding up are having the same magnitude and if you know that he stopped in 2.5 seconds and reached 20 mi/h, from rest, in 2.5 seconds, what is the whole distance traveled by the car?
Note: We assume that the time interval between the stopping and speeding up is negligible.
Work Step by Step
For (a) and (c), see the figure below.
(b) A car coasts at a speed of 20 mi/h when the driver noticed a traffic light station, so he slows the car down to stop exactly at the line. And when he just stopped the light converted to green so he speeds up again from rest. If you know that the accelerations of slowing down and speeding up are having the same magnitude and if you know that he stopped in 2.5 seconds and reached 20 mi/h, from rest, in 2.5 seconds, what is the whole distance traveled by the car?
Note: We assume that the time interval between the stopping and speeding up is negligible.
