In traveling a distance of 2.2 km between points A and D, a car is driven at 102 km/h from A to B for t seconds and 58 km/h from C to D also for t seconds. If the brakes are applied for 3.5 seconds between B and C to give the car a uniform deceleration, calculate t and the distance s between A and B. 102 km/h 58 km/h B 2.2 km

In traveling a distance of 2.2 km between points A and D, a car is driven at 102 km/h from A to B for t seconds and 58 km/h from C to D also for t seconds. If the brakes are applied for 3.5 seconds between B and C to give the car a uniform deceleration, calculate t and the distance s between A and B. 102 km/h 58 km/h B 2.2 km

Physics for Scientists and Engineers, Technology Update (No access codes included)

9th Edition

ISBN:9781305116399

Author:Raymond A. Serway, John W. Jewett

Publisher:Raymond A. Serway, John W. Jewett

Chapter4: Motion In Two Dimensions

Section: Chapter Questions

Problem 4.47P: A police car traveling at 95.0 km/h is traveling west, chasing a motorist traveling at 80.0 km/h....

See similar textbooks

Similar questions

An athlete crosses a 21 m wide river by swimming perpendicular to the water current at a speed of 0.85 m/s relative to the water. He reaches the opposite side at a distance 39 m downstream from his starting point. w = 21 md = 39 mvs = 0.85 m/s a) How fast is the water in the river flowing with respect to the ground in m/s? b) What is the speed of the swimmer with respect to a friend at rest on the ground in m/s?
The brakes on your car can slow you at a rate of 5.2 m/s2. (a) If you are going 137 km/h and suddenly see a state trooper, what is the minimum time in which you can get your car under the 90 km/h speed limit? (The answer reveals the futility of braking to keep your high speed from being detected with a radar or laser gun.) (b) Graph x versus t and v versus t for such a slowing.
At a certain instant, train A is 60 km north of train B. A is travelling south at a rate of 20 km/hr while B is travelling east at 30 km/hr. How fast is the distance between them changing 1 hour later? A. 2 km/hr B. 4 km/hr C. 3 km/hr D. 5 km/hr
Graphing the model. Using the velocity data in Table I, generate a table of estimates that represents the total change of the moving object. Then, use this table of values to graph the model for the velocity function and the distance function. Table I t in seconds 0 5 10 15 20 25 30 35 40 45 v(t) in feet per second 274.27 223.19 179.23 141.4 108.83 80.80 56.68 35.91 18.04 2.65 s(t) ??
Ship A is 15 mi east of O and moving west at 20 mi/h; ship B is 60 mi south of O and moving north at 15 mi/h. Are they approaching or separating after 1 h and at what rate? a. approaching, 12.7 mph c. separating, 12.7 mph b. approaching, 23.0 mph d. separating, 23.0 mph
. An airplane and a helicopter leave an airport in Montana at the same time. The aircrafts' velocities: va = 225 mph, 20.0°, vh = 102 mph, 49.0°. If these velocities are maintained which craft will cross the border into Canada first? Or do they arrive at the same time?
Sphere A is traveling with a constant velocity of +12.0 m/s, while sphere B moves at a velocity of +8.0 m/s and an acceleration of -1.0 m/s^2. At t=0, sphere B is 52.0 meters to the right of sphere A. The two spheres are moving on adjacent tracks. At what time will the two spheres meet?
A river has a steady speed of 0.500 m/s. A student swims upstream a distance of 1.00 km and swims back to the starting point, (a) If the student can swim at a speed of 1.20 m/s in still water, how long does the trip take? (b) How much time is required in still water for the same length swim? (c) Intuitively, why does the swim take longer when there is a current?
A moving beltway at an airport has a speed 1 and a length L. A woman stands on the beltway as it moves from one end to the other, while a man in a hurry to reach his flight walks on the beltway with a speed of 2 relative to the moving beltway. (a) What time interval is required for the woman to travel the distance L? (b) What time interval is required for the man to travel this distance? (c) A second beltway is located next to the first one. It is identical to the first one but moves in the opposite direction at speed 1. Just as the man steps onto the beginning of the beltway and begins to walk at speed relative to his beltway, a child steps on the other end of the adjacent beltway. The child stands at rest relative to this second beltway. How long after stepping on the beltway does the man pass the child?
A police car traveling at 95.0 km/h is traveling west, chasing a motorist traveling at 80.0 km/h. (a) What is the velocity of the motorist relative to the police car? (b) What is the velocity of the police cat relative to the motorist? (c) If they are originally 250 m apart, in what time interval will the police car over take the motorist?
An airplane maintains a speed of 630 km/h relative to the air it is flying through, as it makes a trip to a city 750 km away to the north, (a) What time interval is required for the trip if the plane flies through a headwind blowing at 35.0 km/h toward the south? (b) What time interval is required if there is a tailwind with the same speed? (c) What time interval is required if there is a crosswind blowing at 35.0 km/h to the east relative to the ground?
A Coast Guard cutter detects an unidentified ship at a distance of 20.0 km in the direction 15.0 cast of north. The ship is traveling at 26.0 km/h on a course at 40.0 east of north. The Coast Guard wishes to send a speedboat to intercept and investigate the vessel, (a) If the speedboat travels at 50.0 km/h, in what direction should it head? Express the direction as a compass bearing with respect to due north, (b) Find the time required for the cutter to intercept the ship.