4. A car is traveling at 20.0 m/s, and the driver sees a traffic light turn red. After 0.530 s(the reaction time), the driver applies the brakes, and the car decelerates at 7.00 m/s2.What is the stopping distance of the car, as measured from the point where the driverfirst sees the red light?

Given : vo = 20 m/s t = 0.530 s a = -7 m/s2 (negative because the car decelerates) v = 0 (because…

Answered: 4. A car is traveling at 20.0 m/s, and…

College Physics

10th Edition

ISBN:9781285737027

Author:Raymond A. Serway, Chris Vuille

Publisher:Raymond A. Serway, Chris Vuille

Chapter2: Motion In One Dimension

Section: Chapter Questions

Problem 13P: A person lakes a trip, driving with a constant speed of 89.5 km/h, except, for a 22.0-min rest stop....

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A person lakes a trip, driving with a constant speed of 89.5 km/h, except, for a 22.0-min rest stop. If the persons average speed is 77.8 km/h, (a) how much time is spent on the trip and (b) how far does the person travel?
A person lakes a trip, driving with a constant speed of 89.5 km/h, except, for a 22.0-min rest stop. If the persons average speed is 77.8 km/h, (a) how much time is spent on the trip and (b) how far does the person travel?
A person takes a trip, driving with a constant speed of 89.5 km/h, except for a 22.0-min rest stop. If the persons average speed is 77.8 km/h, (a) how much time is spent on the trip and (b) how far does the person travel?
Hannah tests her new sports car by racing with Sam, an experienced racer. Both start from rest, but Hannah leaves the starting line 1.00 s after Sam does. Sam moves with a constant acceleration of 3.50 m/s2, while Hannah maintains an acceleration of 4.90 m/s2. Find (a) the time at which Hannah overtakes Sam, (b) the distance she travels before she catches him, and (c) the speeds of both cars at the instant Hannah overtakes Sam.
A truck tractor pulls two trailers, one behind the other, at a constant speed of 1.00 102 km/h. It takes 0.600 s for the big rig to completely pass onto a bridge 4.00 102 m long. For what duration of time is all or part of the truck-trailer combination on the bridge?
4. At 12:00 noon, an arctic explorer starts heading back to his base camp located 5.15 km due north, when a snowstorm suddenly rolls in. Due to poor visibility, he ends up walking 6.22 km at 15.0o east of north until the storm breaks. a) After the storm breaks, how far and in what direction must he walk to get back to his camp? b) If he walks at a constant speed and gets back to his camp at 2:30 PM, at what time (to the nearest minute) did the storm break?
2) A police officer is in pursuit of a riding in tandem who was suspected to have snatched a cellphone along a busy road. If the motorcycle used by the officer to catch the culprits is traveling at 20 m/s to 40 m/s just in time to catch the culprits, what is the distance covered by the police officer if it took him 10 seconds to do so?
A blue car is moving at a constant speed of 70 m/s when it passes signage with a police officer beside it. Due to the car's over speeding, the police officer chases it with a constant acceleration of 4 m/s2, one second after the car passes the signage. How long does it the police officer to overtake the truck?
A police car is traveling at a velocity of 16.0 m/s due north, when a car zooms by at a constant speed of 50 m/s due north. After a reaction time of 0.700 s the policeman begins to pursue the speeder with an acceleration of 5.00 m/s2. Including the reaction time, how long does it take for the police car to catch up with the speeder?
Suppose a car is traveling at +21.4 m/s, and the driver sees a traffic light turn red. After 0.511 s has elapsed (the reaction time), the driver applies the brakes, and the car decelerates at 5.00 m/s2. What is the stopping distance of the car, as measured from the point where the driver first notices the red light?
A driver, driving at a constant speed of 30m/s in a 50 mph zone, is unaware that he is being observed by an approaching police car (coming toward him from the front). At time t = 0, they are 800m apart and the police car has an approach speed of 40 m/s. When will the police officer catch up with the motorist? a) 80 s b) 68.6 s c) 11.4 s
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4. A car is traveling at 20.0 m/s, and the driver sees a traffic light turn red. After 0.530 s (the reaction time), the driver applies the brakes, and the car decelerates at 7.00 m/s2. What is the stopping distance of the car, as measured from the point where the driver first sees the red light?