Problem 2.66 Item 3 Review A motorist is driving at 20 m/s when she sees that...
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 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.
A person driving her car at a speed v= 38.0 km/h approaches an intersection just as the traffic light turns yellow. She knows that the traffic light lasts only 1.5 sec, before turning to red, and she is a distance d= 30.0 m away from the near side of the intersection (see figure). The width of the intersection is w = 13.9 m. Her car's maximum deceleration is -5.50 m/s, and its maximum acceleration is 0.950 m/s2. - W -...
A driver is traveling 18.6 m/s when she sees a red light ahead. Her car is capable of decelerating at a rate of 3.55 m/s2 . How far from the beginning of the intersection will she be?
You are driving to the grocery store at 20 m/s . You are 1.10×102m from an intersection when the traffic light turns red. Assume that your reaction time is 0.79 s and that your car brakes with constant acceleration. A) How far are you from the intersection when you begin to apply the brakes? B) What acceleration will bring you to rest right at the intersection? C) How long does it take you to stop after the light turns red?
You are driving to the grocery store at 20 m/s. You are 110 m from an intersection when the traffic light turns red. Assume that your reaction time is 0.70 s and that your car brakes with constant acceleration. a. How far are you from the intersection when you begin to apply the brakes? b. What acceleration will bring you to rest right at the intersection? c. How long does it take you to stop?
You are driving to the grocery store at 16 m/s. You are 160 m from an intersection when the traffic light turns red. Assume that your reaction time is 0.50 s and that your car brakes with constant acceleration. Part A What magnitude braking acceleration will bring you to a stop exactly at the intersection? E
Refer to Multiple-Concept Example 5 to review a method by which this problem can be solved. You are driving your car, and the traffic light ahead turns red. You apply the brakes for 2.24 s, and the velocity of the car decreases to4.87 m/s. The car's deceleration has a magnitude of 3.08 m/s2 during this time. What is the car's displacement? the tolerance is +/-590
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 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...