The city is trying to figure out how long the traffic light should stay yellow at...
The city is trying to figure out how long the traffic light should stay yellow at an intersection. The speed limit on the road is 45.0 km/h and the intersection is 23.0 m wide. A car is traveling at the speed limit in the positive direction and can brake with an acceleration of ?5.20 m/s2. (a) If the car is to stop on the white line, before entering the intersection, what is the minimum distance from the line at which the driver must apply the brakes? (b) How long should the traffic light stay yellow so that if the car is just closer than that minimum distance when the light turns yellow, it can safely cross the intersection without having to speed up?
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The city is trying to figure out how long the traffic light
should stay yellow at...
A motorist is traveling at 54 km/h when she observes that a traffic light 240 m ahead of her turns red. The traffic light is timed to stay red for 24 s.
A motorist is traveling at 54
km/h when she observes that a traffic light 240 m ahead of her
turns red. The traffic light is timed to stay red for 24 s. If the
motorist wishes to pass the light without stopping just as it turns
green again, determine (a) the required uniform deceleration of the
car, (b) the speed of the car as it passes the light.
You are driving towards a traffic signal when it turns yellow. You are travelling at 15.5...
You are driving towards a traffic signal when it turns yellow. You are travelling at 15.5 m/s and as you break, you decelerate at a constant rate of 3.5 m/s2. Your reaction time before breaking is 0.75 s. If the distance to the intersection is 40 m, willl your car stop before the intersection? If the duration of the yellow light was 3.2 seconds, would you have been able to pass the traffic signal before the light turned red?
A car, on a straight road, is stopped at a traffic light. When the light turns...
A car, on a straight road, is stopped at a traffic light. When the light turns to green the car accelerates with a constant acceleration. It reaches a speed of 20.6 m/s (74.2 km/h) in a distance of 107 m. Calculate the acceleration of the car.
Problem 11.34 A motorist is traveling at 54 km/h when she observes that a traffic light...
Problem 11.34 A motorist is traveling at 54 km/h when she observes that a traffic light 240 m ahead of her turns red The traffic light is timed to stay red for 24 s. If the motorist wishes to pass the light without stopping just as it turns green again, determine (a) the required uniform deceleration of the car (b) the speed of the car as it passes the light 240 m
A person driving her car at 49.0 km/hr approaches an intersection just as the traffic light...
A person driving her car at 49.0 km/hr approaches an intersection just as the traffic light turns yellow. She knows that the yellow light lasts only 1.80 s before turning to red, and she is a distance D = 35.0 m away from the near side of the intersection. If she decides to stop, how far from the intersection will she come to a stop? The intersection is W =11.0 m wide. Her car's maximum deceleration is -5.70 m/s2. Ignore...
At the instant the traffic light turns green, a car that has been waiting at an...
At the instant the traffic light turns green, a car that has been waiting at an intersection starts ahead with a constant acceleration of 3.2 m/s^2. At the same instant a truck, traveling with a constant speed of 20 m/s overtakes and passes the car. (a) How far beyond its starting point does the car overtake the truck? (b) How fast is the car traveling when it overtakes the truck?
How do I solve this and what is the correct answer? as a function of time...
How do I solve this and what is the correct answer?
as a function of time is given by Fig. 2-36. 87. A person driving her car at 45 km/h approaches an intersec tion 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 28 m away from the near side of the intersection (Fig. 51) Should she try to stop, or should she speed up...
A truck traveling at 50 km/hr approaches a car stopped at a red light. When the...
A truck traveling at 50 km/hr approaches a car stopped at a red light. When the truck is 100 m from the car, the light turns green and the car immediately begins to accelerate at 2 m/s2 to a final speed of 100 km/hr. A) • How long does it take for the car to reach its maximum speed? B)During this time, how far does the car travel? C)What is the distance between the truck and the car 20 seconds...
As a city planner, you receive complaints from local residents about the safety of nearby roads and streets. One compla...
As a city planner, you receive complaints from local residents about the safety of nearby roads and streets. One complaint concerns a stop sign at the corner of Pine Street and 1st Street. Residents complain that the speed limit in the area (89 km/h) is too high to allow vehicles to stop in time. Under normal conditions this is not a problem, but when fog rolls in visibility can reduce to only 47 meters. Because fog is a common occurrence...
Constants Part A At the instant the traffic light turns green, a car that has been...
Constants Part A At the instant the traffic light turns green, a car that has been waiting at an intersection starts ahead with a constant acceleration of 2.80 m/s2. At the same instant a truck, traveling with a constant speed of 20.0 m/s, overtakes and passes the car How far beyond its starting point does the car overtake the truck? Express your answer with the appropriate units. FalueUnits Submit ▼ Part B How fast is the car traveling when it...
You are driving towards a traffic signal when it turns yellow. You are travelling at 15.5 m/s and as you break, you decelerate at a constant rate of 3.5 m/s2. Your reaction time before breaking is 0.75 s. If the distance to the intersection is 40 m, willl your car stop before the intersection? If the duration of the yellow light was 3.2 seconds, would you have been able to pass the traffic signal before the light turned red?
Problem 11.34 A motorist is traveling at 54 km/h when she observes that a traffic light 240 m ahead of her turns red The traffic light is timed to stay red for 24 s. If the motorist wishes to pass the light without stopping just as it turns green again, determine (a) the required uniform deceleration of the car (b) the speed of the car as it passes the light 240 m
How do I solve this and what is the correct answer?
as a function of time is given by Fig. 2-36. 87. A person driving her car at 45 km/h approaches an intersec tion 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 28 m away from the near side of the intersection (Fig. 51) Should she try to stop, or should she speed up...
As a city planner, you receive complaints from local residents about the safety of nearby roads and streets. One complaint concerns a stop sign at the corner of Pine Street and 1st Street. Residents complain that the speed limit in the area (89 km/h) is too high to allow vehicles to stop in time. Under normal conditions this is not a problem, but when fog rolls in visibility can reduce to only 47 meters. Because fog is a common occurrence...
Constants Part A At the instant the traffic light turns green, a car that has been waiting at an intersection starts ahead with a constant acceleration of 2.80 m/s2. At the same instant a truck, traveling with a constant speed of 20.0 m/s, overtakes and passes the car How far beyond its starting point does the car overtake the truck? Express your answer with the appropriate units. FalueUnits Submit ▼ Part B How fast is the car traveling when it...
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