Question

Please answer parts A and C to the question. Thank you.

3. You are driving on the freeway at 80 mph, trailing the car in front of you by two seconds. Suddenly, the car in front of you - also traveling at 80 mph brakes to stop; its tires are new, with a friction coefficient of 0.8. Your car, on the other hand, has poor tires with a coefficient of 0.5. Due to distracting music and passengers, you do not react to the front car's brake lights for 1 second. We will determine whether you will crash into the car in front of you before coming to a complete stop: (a) If your car is at position 0, at what position is the car in front of you when it begins to brake? b) How far will the car in front of you travel before stopping, according to your Stopping Dist ance (c) Relative to your starting position of 0, at what position will your car be when you begin to (That is, how many feet in front of you is the other car?) function? What will its position be after stopping? brake? d) How far will your car trarel before stopping? (e) Will you hit the car in front of you? Explain, showing your fin al stopping position vs. the other car's. (f) Would you have hit the car if your tires had been in almost-new condition (coefficient 0.7)? Show your work.

Answer 1

"so position of car B chi = 4t = 80 mph times t = 80 m/60 times 60 times 2 sec chi = 16/360 = 0.0444 mile from the car ""A"" car A starts to break after 1 sec so distance travelled in 1 sec chi = 4 t = 80 mph times t = 80 m/60 times 60 sec times 1 sec = 0.0222 mile from reprece potion "