FUNDAMENTALS OF PHYSICS - EXTENDED
12th Edition
ISBN: 9781119773511
Author: Halliday
Publisher: WILEY
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Chapter 2, Problem 40P
You are driving toward a traffic signal when it turns yellow. Your speed is the legal speed limit of v0 = 55 km/h; your best deceleration rate has the magnitude a = 5.18 m/s2. Your best reaction time to begin braking is T = 0.75 s. To avoid having the front of your car enter the intersection after the light turns red, should you brake to a stop or continue to move at 55 km/h if the distance to the intersection and the duration of the yellow light are (a) 40 m and 2.8 s, and (b) 32 m and 1.8 s? Give an answer of brake, continue, either (if either strategy works), or neither (if neither strategy works and the yellow duration is inappropriate).
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You are driving toward a traffic signal when it turns yellow. Your speed is the legal speed limit of v0 55 km/h; your best deceleration rate has the magnitude a = 5.18 m/s2.Your best reaction time to begin braking is T = 0.75 s.To avoid having the front of your car enter the intersection after the light turns red, should you brake to a stop or continue to move at 55 km/h if the distance to the intersection and the duration of the yellow light are (a) 40 m and 2.8 s, and (b) 32 m and 1.8 s? Give an answer of brake, continue, either (if either strategy works), or neither (if neither strategy works and the yellow duration is inappropriate).
While driving at 45.0 mi/hr (20.1 m/s) on a straight portion of Route 9 West, Randi notices that the traffic light has turned red
at the intersection directly ahead. Randi applies his brakes, slows his car down at a steady rate, and brings his car to rest,
while traveling the 60.0 m distance to the stop line (at the red light).
21. While he is slowing down, the acceleration of Randi's car has a magnitude of
A. 6.73 m,
В. 16.9 m
2.
169 m/:
А.
С. 33,8 т
D. 9.80 m
E. 3.37 m
/
22. How much time passes as Randi's car slows down from 45.0 mi/hr to 0 m/s?
A. 20.68 s.
B. 5.97 s.
C. 2.66 s.
D. 2.99 s.
E. 0.596 s.
23. While Randi's car is slowing down, his car's acceleration is
A. directed straight down towards the Earth's center.
B. equal to zero.
C. directed straight upwards.
D. directed parallel to the car's velocity.
E. directed antiparallel to the car's velocity.
An ambulance driver is rushing a patient to the hospital. While traveling at 71.1 km/h, she notices the traffic light at the upcoming intersection has turned yellow. To reach the intersection before the light turns red, she must travel 52 m in 2.17 seconds.
What is the magnitude of the minimum acceleration, in m/s2, required to reach the intersection before the light turns red?
Chapter 2 Solutions
FUNDAMENTALS OF PHYSICS - EXTENDED
Ch. 2 - Suppose that a passenger intent on lunch during...Ch. 2 - While driving a car at 90 km/h, how far do you...Ch. 2 - Compute your average velocity in the following two...Ch. 2 - SSM WWW An automobile travels on a straight road...Ch. 2 - A car moves uphill at 40 km/h and then back...Ch. 2 - SSM The position of an object moving along an x...Ch. 2 - The 1992 world speed record for a bicycle...Ch. 2 - Two trains, each having a speed of 30 km/h, are...Ch. 2 - ILW In 1 km races, runner 1 on track 1with time 2...Ch. 2 - To set a speed record in a measured straight-line...
Ch. 2 - GO You are to drive 300 km to an interview. The...Ch. 2 - ILW You drive on Interstate 10 from San Antonio to...Ch. 2 - GO An electron moving along the x axis has a...Ch. 2 - GO a If a particles position is given by x = 4 ...Ch. 2 - The position function xt of a particle moving...Ch. 2 - The position of a particle moving along the x axis...Ch. 2 - The position of a particle moving along an x axis...Ch. 2 - SSM At a certain time a particle had a speed of 18...Ch. 2 - a If the position of a particle is given by x =...Ch. 2 - From t = 0 to t = 5.00 min, a man stands still,...Ch. 2 - The position of a particle moving along the x axis...Ch. 2 - Catapulting mushrooms. Certain mushrooms launch...Ch. 2 - An electric vehicle starts from rest and...Ch. 2 - A muon an elementary particle enters a region with...Ch. 2 - An electron has a constant acceleration of 3.2...Ch. 2 - On a dry road, a car with good tires may be able...Ch. 2 - ILW A certain elevator cab has a total run of 190...Ch. 2 - The brakes on your car can slow you at a rate of...Ch. 2 - SSM Suppose a rocket ship in deep space moves with...Ch. 2 - SSM ILW A car traveling 56.0 km/h is 24.0 m from a...Ch. 2 - A car moves along an x axis through a distance of...Ch. 2 - a If the maximum acceleration that is tolerable...Ch. 2 - You are driving toward a traffic signal when it...Ch. 2 - GO You are arguing over a cell phone while...Ch. 2 - When startled, an armadillo will leap upward....Ch. 2 - SSM WWWa With what speed must a ball be thrown...Ch. 2 - Raindrops fall 1700 m from a cloud to the ground....Ch. 2 - SSMAt a construction site a pipe wrench struck the...Ch. 2 - A hoodlum throws a stone vertically downward with...Ch. 2 - SSM A hot-air balloon is ascending at the rate of...Ch. 2 - GO A bolt is dropped from a bridge under...Ch. 2 - SSM ILW A key falls from a bridge that is 45 m...Ch. 2 - GO A stone is dropped into a river from a bridge...Ch. 2 - SSM A ball of moist clay falls 15.0 m to the...Ch. 2 - To test the quality of a tennis ball, you drop it...Ch. 2 - An object falls a distance h from rest. If it...Ch. 2 - Water drips from the nozzle of a shower onto the...Ch. 2 - GO A rock is thrown vertically upward from ground...Ch. 2 - GO A steel ball is dropped from a buildings roof...Ch. 2 - A basketball player grabbing a rebound jumps76.0...Ch. 2 - GO A drowsy cat spots a flowerpot that sails first...Ch. 2 - Two particles move along an x axis. The position...Ch. 2 - In an arcade video game, a spot is programmed to...Ch. 2 - A rock is shot vertically upward from the edge of...Ch. 2 - GO At the instant the traffic light turns green,...Ch. 2 - GO To stop a car, first you require a certain...Ch. 2 - SSM A hot rod can accelerate from 0 to 60 km/h in...Ch. 2 - GO A red train traveling at 72 km/h and a green...Ch. 2 - A train started from rest and moved with constant...Ch. 2 - SSM A particles acceleration along an x axis is a...Ch. 2 - A rocket-driven sled running on a straight, level...Ch. 2 - Prob. 85PCh. 2 - Prob. 86PCh. 2 - Prob. 87PCh. 2 - Prob. 88PCh. 2 - Prob. 89PCh. 2 - Prob. 90PCh. 2 - Prob. 91PCh. 2 - Prob. 92PCh. 2 - Prob. 93PCh. 2 - Prob. 94PCh. 2 - Prob. 95PCh. 2 - Prob. 96PCh. 2 - Prob. 97PCh. 2 - Prob. 98PCh. 2 - Prob. 99PCh. 2 - Prob. 100PCh. 2 - Prob. 101PCh. 2 - Prob. 102PCh. 2 - Prob. 103PCh. 2 - Prob. 104PCh. 2 - Prob. 105PCh. 2 - Prob. 106PCh. 2 - Prob. 107PCh. 2 - Prob. 108PCh. 2 - Prob. 109P
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