Question
A car is driving at a speed of 66.0 km/h toward an intersection just as the light changes from green to yellow. The driver has a reaction time of 0.750 s and the magnitude of the braking acceleration of the car is 5.50 m/s2.Find the minimum distance
the car travels before coming to a stop after the light changes.
the car travels before coming to a stop after the light changes.
Answers
Henry
V = 68km/h = 68000m/3600s = 18.9 m/s.
d = v*t + 0.5a*t^2.
d = 18.9*0.75 - 0.5*5.5*0.75^2 = 12.6 m.
d = v*t + 0.5a*t^2.
d = 18.9*0.75 - 0.5*5.5*0.75^2 = 12.6 m.