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If she hits the brakes, how far will she travel before stopping?

  • Thread starter rakesh44
  • Start date
4
0
1. Homework Statement
A person driving her car at 56 km/h approaches an intersection just as the traffic light turns yellow. She knows that the yellow light lasts only 2.0 s before turning to red, and she is 30 m away from the near side of the intersection (Fig. 2-29). Should she try to stop, or should she make a run for it? The intersection is 15 m wide. Her car's maximum deceleration is -5.6 m/s2, whereas it can accelerate from 56 km/h to 70 km/h in 4.2 s. Ignore the length of her car and her reaction time. If she hits the brakes, how far will she travel before stopping?


2. Homework Equations
can someone at least give me a formula that i can use to find the answer??
thankss
 

rl.bhat

Homework Helper
4,433
5
Refer any text book and list the kinematic equations.
 

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