On a one lane road, a person driving a car at v = 78 mi/h suddenly notices atruck 0.65 mi in front of him. That truck is moving in the same direction at v, = 41 mi/h. In order toavoid a collision, the person has to reduce the speed of his car to v2 during time interval At. Thesmallest magnitude of acceleration required for the car to avoid a collision is a. During this problem,assume the direction of motion ofhe car is the positive direction. Refer to the figure. O Enter an expression, in terms of defined quantities, for the distance, Ax,, traveled by the truck during the time interval AtFAx2789.НOMEBAtd.1A 46.a

Initial speed of the car is v1 = 78 mi/h Truck is moving at a speed of v2 = 41 mi/h Distance…

Answered: On a one lane road, a person driving a…

College Physics

11th Edition

ISBN:9781305952300

Author:Raymond A. Serway, Chris Vuille

Publisher:Raymond A. Serway, Chris Vuille

Chapter1: Units, Trigonometry. And Vectors

Section: Chapter Questions

Problem 1CQ: Estimate the order of magnitude of the length, in meters, of each of the following; (a) a mouse, (b)...

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MY NOTES ASK YOUR TEACHER A cab driver heads south with a steady speed of v, -20.0 m/s for t-3.00 min, then makes a right turn and travels at v₂ - 25.0 m/s for fy 2.20 min, and then drives northwest at v₂ - 30.0 m/s for ty-1.00 min. For this 6.20-min trip, calculate the following. Assume +x is in the eastward direction. (a) total vector displacement (Enter the magnitude in m and the direction in degrees south of west.) Im magnitude direction (b) average speed (in m/s) m/s south of west (c) average velocity (Enter the magnitude in m/s and the direction in degrees south of west.) magnitude: direction m/s south of west
A car is stopped at a traffic light. It then travels along a straight road so that its distance from the light is given by x(t) = bt^2-ct^3, where b = 2.40 m/s^2 and c = 0.120 m/s^3. a) Calculate the average velocity of the car for time interval t = 0 to t = 10.0 s. b) Calculate the instantaneous velocity of the car at t = 0, t = 5.0 s, and t = 10.0 s. c) How long after starting from rest is the car again at rest?
The catapult of the aircraft carrier USS Lincoln accelerates an F/A-18 Hornet jet fighter from rest to take off speed of 173mi/h in a distance of 307ft. Assume a constant acceleration. a) Calculate the acceleration of the jet fighter in m/s^2 b) Calculate the time required for the fighter to be accelerated to take off speed.
Part (a) Enter an expression, in terms of A, B, and t, for the velocity of the particle as a function of time. v(t) = ______ Part (b) At what time, in seconds, is the particle’s velocity zero? t = ______s
A distance of 60 meters separates two jetskis at Virginia Beach. Starting at rest, the jetskis accelerate at a constant rate of 0.2 m/s2 towards each other.Starting at a midpoint between the two jetskis, a porpoise is seen swimming from one jetski to the other at a constant speed of 16 m/s. The porpoise continues swimming back and forth between the jetskis until they crash together.a) What is the total distance the porpoise travelled? b) what is the speed of the jetskis when they crash together?
Assume you are driving a car at a constant speed of 76 km/h. Suddenly you see a deer standing on the highway and you must put on the brakes. Your reaction time (time elapsed between the moment you see the deer and your foot hitting the brakes) is 0.118 s. The brakes provide an acceleration with a magnitude of 4 m/s2, and a direction opposite the initial velocity. How do you find the total distance traveled?
You are driving your car uphill along a straight road. Of Suddenly, you see a car go through a red light and enter the intersection, just ahead of you. you. You immediately apply your brakes and skid straight to a stop, leaving a 100 ft long mark from the landslide. A policeman observes the whole incident, give the driver of the car a ticket for running a red light. He also gives a ticket to you for exceeding the 30 mph speed limit. When you get home, you read your physics book and you may notice that the coefficient of kinetic friction between the tires and the road was 0.60, and the coefficient of static friction was 0.80. You estimate that the hill makes an angle of about 10° with the horizontal. Check the manual owner and find that your car weighs 2,050 lbs. Are you going to claim the traffic ticket? in the court? Support your argument. Please type answer not write by hend
Can an object have a negative acceleration and be speeding up? If so, describe a possible physical situation and a corresponding coordinate system. If not, explain why not.
A car traveling at 33.0 km/h speeds up to 45.0 km/h in a time of 7.00 s. The same car later speeds up from 63.0 km/h to 75.0 km/h in a time of 7.00 s. Let the +x direction point in the direction the car is traveling. Calculate the magnitude a, of the constant acceleration for the first time interval. Determine the distance de traveled by the car during the first time interval. Calculate the magnitude ay of the constant acceleration for the second time interval. m/s² m/s² E
A car, as shown in the figure, is moving towards the left, which is the negative x direction. It travels a distance d=31.7m during time interval Δt=8.48s. a) What is the car’s average speed, in meters per second, during the time interval? b) What is the value of the x component of the car’s average velocity, in meters per second, during the given time interval?
A car, moving to the left in a straight line in the negative x-direction, travels a distance d = 32 m during time interval Δt = 18 s. What is the value of the x-component of the car's average velocity, in m/s, during the given time interval?

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