Braking speed

What speed was the car moving until the driver started braking when it moved with a constant acceleration a = -1.2 m/s2 during braking until it stopped, traveling a distance of 135 m?

Final Answer:

v =  18 m/s

Step-by-step explanation:

s=135 m a=1.2 m/s2  s = 21 a t2 t=2 s/a=2 135/1.2=15 s  v=a t=1.2 15=18 m/s



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