The magnitudes of the first three vectors are A = 3.20 km, B = 510 km and C = 4.
ID: 1555321 • Letter: T
Question
The magnitudes of the first three vectors are A = 3.20 km, B = 510 km and C = 4.80 km. The finish line of the course coincides with the starting line. Using the data in the drawing, find the magnitude and direction of D. A car is traveling with constant velocity v = 20.0 m/s when the driver sees a traffic light turn red. After 0.530 s (the reaction time), the driver applies the brakes, and the car decelerates at 7.00 m/s^2 until it stops. a. How many different accelerations does the car have? What are they? b. How far does the car move after the driver sees the red light but before he applies the brakes? c. How far does the car move after the driver applies the brakes? What is the stopping distance of the car, or total distance traveled by the car as measured from the point where the driver first sees the red light until it stops? d. How long does the car move after the driver applies the brakes? How long does it take the car to stop measured from the point where the driver first sees the red light? e. Make a graph of velocity as function of time for the whole motion.Explanation / Answer
1) three different acceleration are here
2) s = ut = 20*0.53 = 10.6 m
3) s = ut+1/2at^2 = 20*0.53-1/2*7*0.53^3
s = 9.62 m
4)
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