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A car is moving on a city street at a speed of 30 km/h. The driver...

A car is moving on a city street at a speed of 30 km/h. The driver sees a red traffic signal ahead and slams on the brakes, providing an acceleration that has magnitude 6.0 m/s2. The driver's reaction time is 0.50 s. (a) Determine the displacement of the car until it stops. ___m (b) Repeat Part (a) if the initial speed is 60 km/h and the braking acceleration is the same as in Part (a). ___m

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Answer #1

y D 30Km/hy-ㄧㄧㄨㄧ-○ rss 25 m Koss 3 2 2 %,-23 M 218m

Total displacement is equal to the displacement travelled during the reaction time plus while deceleration.

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