GO Figure 2-42 shows part of a street where traffic flowis to be controlled to allow a platoon of cars to move smoothly along the street. Suppose that the platoon leaders have justreached intersection 2, where the green appeared when they were distance d from the intersection. They continue to travel at a certain speed v p (the speed limit) to reach intersection 3, where the green appears when they are distance d from it. The intersections are separated by distances D 23 and D 12 . (a) What should be the time delay of the onset of green at intersection 3 relative to that at intersection 2 to keep the platoon moving smoothly? Figure 2-42 Problem 76. Suppose, instead, that the platoon had been stopped by a red light at intersection 1. When the green comes on there, the leaders require a certain time t r to respond to the change and an additional time to accelerate at some rate a to the cruising speed v p . (b) If the green at intersection 2 is to appear when the leaders are distance d from that intersection, how long after the light at intersection 1 turns green should the light at intersection 2 turn green?
GO Figure 2-42 shows part of a street where traffic flowis to be controlled to allow a platoon of cars to move smoothly along the street. Suppose that the platoon leaders have justreached intersection 2, where the green appeared when they were distance d from the intersection. They continue to travel at a certain speed v p (the speed limit) to reach intersection 3, where the green appears when they are distance d from it. The intersections are separated by distances D 23 and D 12 . (a) What should be the time delay of the onset of green at intersection 3 relative to that at intersection 2 to keep the platoon moving smoothly? Figure 2-42 Problem 76. Suppose, instead, that the platoon had been stopped by a red light at intersection 1. When the green comes on there, the leaders require a certain time t r to respond to the change and an additional time to accelerate at some rate a to the cruising speed v p . (b) If the green at intersection 2 is to appear when the leaders are distance d from that intersection, how long after the light at intersection 1 turns green should the light at intersection 2 turn green?
GO Figure 2-42 shows part of a street where traffic flowis to be controlled to allow a platoon of cars to move smoothly along the street. Suppose that the platoon leaders have justreached intersection 2, where the green appeared when they were distance d from the intersection. They continue to travel at a certain speed vp (the speed limit) to reach intersection 3, where the green appears when they are distance d from it. The intersections are separated by distances D23 and D12. (a) What should be the time delay of the onset of green at intersection 3 relative to that at intersection 2 to keep the platoon moving smoothly?
Figure 2-42 Problem 76.
Suppose, instead, that the platoon had been stopped by a red light at intersection 1. When the green comes on there, the leaders require a certain time tr to respond to the change and an additional time to accelerate at some rate a to the cruising speed vp. (b) If the green at intersection 2 is to appear when the leaders are distance d from that intersection, how long after the light at intersection 1 turns green should the light at intersection 2 turn green?
Most important in an investigation of an airplane crash by the U.S. National Transportation Safety Board is the data stored on the airplane’s flight-data recorder, commonly called the “black box” in spite of its orange coloring and reflective tape.The recorder is engineered to withstand a crash with an average deceleration of magnitude 3400g during a time interval of 6.50 ms. In such a crash, if the recorder and airplane have zero speed at the end of that time interval, what is their speed at the beginning of the interval?
A driver is initially traveling 21.1m/s to the right and then slams on the brakes to accelerate at a magnitude of 4.5m/s/s until she comes to a complete stop. If she started applying her brakes at a position of 263m from zero, then where is her final position from zero?
how much time would it take you to cover the61-m length of the walkway if, once you get on the walkway, youimmediately turn around and start walking in the opposite direction with a speed of 1.3 m>s relative to the walkway?
Conceptual Physics: The High School Physics Program
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