physics
posted by Anonymous .
Suppose that a senior driving a Pontiac zooms out of a darkened tunnel at 39.4 m/s. She is momentarily blinded by the sunshine. When she recovers, she sees that she is fast overtaking a camper ahead in her lane moving at the slower speed of 12.9 m/s. She hits the brakes as fast as she can (her reaction time is 0.36 s). If she can decelerate at 3.6 m/s^2, what is the minimum distance between the driver and the camper when she first sees it so that they do not collide?

s₀=v₀•t₀=39.4•0.36 =14.2 m
s1=v²v₀²)/2(a) = (2.9²39.4²)/2(3.6)=5.17 m.
s= s1+s₀=5.17+14.2=19.37 m.
Respond to this Question
Similar Questions

Physics
Speedy Sue during is driving at 30.0m/s and enters a 1 lane tunnel. She then observes a slow moving van 155m ahead traveling at 5.0m/s. She applies the brakes but can only accelerate at 2.0m/s^2 b/c road is wet. a) will there be a … 
physics
Speedy Sue, driving at 30.0 m/s enters a onelane tunnel. She then observes a slowmoving van 155m ahead traveling at 5.00 m/s. Sue applies her brakes but can accelerate only at 2.00m/s/s because the road is wet. Will there be a collision? 
Physics
A truck travels at a constant speed of 28.0 m/s in the fast lane of a twolane highway. It approaches a stationay car stopped at the side of the road. When the truck is still 1.2x10^2 m behind the car, the car pulls out into the slow … 
Physics
Heyy is anybdy good at physics I am stuck on this question ... ... A camper van with a mass of 2500 kg has a maximum driving force of 2650 N. The camper van drives along a straight road at a constant speed of 90 kilomatres per hour. … 
physics
Suppose that a senior driving a Pontiac zooms out of a darkened tunnel at 31.0 m/s. She is momentarily blinded by the sunshine. When she recovers, she sees that she is fast overtaking a bus ahead in her lane moving at the slower speed … 
Physics
Suppose that a woman driving a Mercedes zooms out of a darkened tunnel at 33.9 m/s. She is momentarily blinded by the sunshine. When she recovers, she sees that she is fast overtaking a bus ahead in her lane moving at the slower speed … 
physics
You are driving on a very long, very straight 2 lane road, stuck behind a lorry which travels at a constant 75 km/hour. You want to overtake the lorry, which has a length of 12.0 m. You car is 3.8 m long. To overtake the lorry, and … 
physics
You are driving on a very long, very straight 2 lane road, stuck behind a lorry which travels at a constant 75 km/hour. You want to overtake the lorry, which has a length of 12.0 m. You car is 3.8 m long. To overtake the lorry, and … 
math
In the 400 meter dash runners stay in their lanes the entire distance around the track. If the runners would all start at the same line (the finish line) only the runner in lane 1 would be running 400 meters. Everyone else would be … 
Drivers ED
You are driving on a two lane street and you take notice that there is a broken white line between the two lanes. Ahead of you there is a car in the other lane coming toward you. Which is the most likely problem in this situation?