d = Vo*t = 21m/s * 0.245s =
V^2 = Vo^2 + 2a*d.
V = 0.
Vo = 21 m/s.
a = -5.29 m/s.
d = ?.
A car is traveling at a constant velocity of 21 m/s (about 45 mph). The driver sees a fallen tree lying across the road and hits the brakes after a delay (reaction time) of 245 ms. (1 ms = 10-3 s.)
Calculate the distance the car travels during this 245 ms reaction time period.
Once the brakes are applied, the car slows to a stop with an acceleration of -5.29 m/s2. Calculate the distance the car travels while the brakes are applied.
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