EBK PHYSICS FOR SCIENTISTS & ENGINEERS
5th Edition
ISBN: 9780134296074
Author: GIANCOLI
Publisher: VST
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(III) A fugitive tries to hop on a freight train traveling at a constant speed of 5.00 m/s Just as an empty box car passes him, the fugitive starts from rest and accelerates at a= 1.4 m/s2 to his maximum speed of 6.0 m/s which he then maintains. (a) How long does it take him to catch up to the empty box car? (b) What is the distance traveled to reach the box car?
(b) The speed of a train is reduced uniformly from 20 km/h to 10 km/h while travelling a
distance of 80 m.
(1)
(ii)
E
(iv)
Calculate the deceleration of the train.
Assuming that the deceleration is constant, how much further will the train
travel before coming to rest?
Determine the total time taken for the train to come to rest from a speed of 20
km/h.
Sketch the velocity versus time graph for the motion of the train.
A person driving her car at 35 km/h approaches an inter-
section just as the traffic light turns yellow. She knows that
the yellow light lasts only 2.0s before turning to red, and
she is 28 m away from the near side of the intersection
(Fig. 2–49). Should she try to stop, or should she speed up
to cross the intersection before the light turns red? The
intersection is 15 m wide. Her car's maximum deceleration
is -5.8 m/s?, whereas it can accelerate from 45 km/h to
65 km/h in 6.0 s. Ignore the length of her car and her
reaction time.
– 28 m -
-15 m→
FIGURE 2-49 Problem 73.
Chapter 2 Solutions
EBK PHYSICS FOR SCIENTISTS & ENGINEERS
Ch. 2.1 - An ant starts at x = 20cm on a piece of graph...Ch. 2.3 - What is your speed at the instant you turn around...Ch. 2.4 - A powerful car is advertised to go from zero to 60...Ch. 2.4 - A car moves along the x axis. What is the sign of...Ch. 2.4 - The position of a particle is given by the...Ch. 2.5 - Prob. 1FECh. 2.7 - Prob. 1GECh. 2.7 - Prob. 1HECh. 2 - Does a car speedmeter measure speed, velocity, or...Ch. 2 - Can an object have a varying speed if its velocity...
Ch. 2 - When an object moves with constant velocity, does...Ch. 2 - If one object has a greater speed than a second...Ch. 2 - Compare the acceleration of a motorcycle that...Ch. 2 - Can an object have a northward velocity and a...Ch. 2 - Can the velocity of an object be negative when its...Ch. 2 - Give an example where both the velocity and...Ch. 2 - Two cars emerge side by side from a tunnel. Car A...Ch. 2 - Can an object be increasing in speed as its...Ch. 2 - A baseball player hits a ball straight up into the...Ch. 2 - As a freely falling object speeds up, what is...Ch. 2 - You travel from point A to point B in a car moving...Ch. 2 - Can an object have zr velocity and nonzero...Ch. 2 - Can an object have zero acceleration and nonzero...Ch. 2 - Which of these motions is not at constant...Ch. 2 - Prob. 17QCh. 2 - Describe in words the motion plotted in Fig. 236...Ch. 2 - Describe in words the motion of the object graphed...Ch. 2 - Prob. 1MCQCh. 2 - Prob. 2MCQCh. 2 - Prob. 4MCQCh. 2 - Prob. 5MCQCh. 2 - Prob. 6MCQCh. 2 - Prob. 7MCQCh. 2 - Prob. 9MCQCh. 2 - Prob. 11MCQCh. 2 - (I) If you are driving 110 km/h along a straight...Ch. 2 - What must your cars average speed be in order to...Ch. 2 - (I) A particle at t1 = 2.0 s is at x1 = 4.3 cm and...Ch. 2 - (II) According to a rule-of-thumb, every five...Ch. 2 - Prob. 5PCh. 2 - Prob. 6PCh. 2 - Prob. 7PCh. 2 - Prob. 8PCh. 2 - Prob. 9PCh. 2 - Prob. 10PCh. 2 - Prob. 11PCh. 2 - Prob. 12PCh. 2 - Prob. 13PCh. 2 - Prob. 14PCh. 2 - Prob. 15PCh. 2 - Prob. 16PCh. 2 - Prob. 17PCh. 2 - Prob. 18PCh. 2 - Prob. 19PCh. 2 - Prob. 20PCh. 2 - Prob. 21PCh. 2 - Prob. 22PCh. 2 - Prob. 24PCh. 2 - (II) A car moving in a straight line starts at x =...Ch. 2 - Prob. 26PCh. 2 - Prob. 27PCh. 2 - (II) The position of a racing car, which starts...Ch. 2 - Prob. 29PCh. 2 - Prob. 30PCh. 2 - Prob. 31PCh. 2 - Prob. 32PCh. 2 - Prob. 33PCh. 2 - Prob. 34PCh. 2 - Prob. 35PCh. 2 - Prob. 36PCh. 2 - Prob. 37PCh. 2 - Prob. 38PCh. 2 - Prob. 39PCh. 2 - Prob. 40PCh. 2 - (II) A car traveling 85 km/h slows down at a...Ch. 2 - Prob. 42PCh. 2 - Prob. 43PCh. 2 - Prob. 45PCh. 2 - Prob. 46PCh. 2 - Prob. 47PCh. 2 - Prob. 48PCh. 2 - Prob. 49PCh. 2 - Prob. 50PCh. 2 - Prob. 52PCh. 2 - Prob. 53PCh. 2 - Prob. 54PCh. 2 - Prob. 55PCh. 2 - Prob. 56PCh. 2 - Prob. 57PCh. 2 - (II) The best rebounders in basketball have a...Ch. 2 - Prob. 59PCh. 2 - Prob. 60PCh. 2 - Prob. 61PCh. 2 - Prob. 62PCh. 2 - Prob. 63PCh. 2 - Prob. 64PCh. 2 - Prob. 65PCh. 2 - Prob. 66PCh. 2 - Prob. 67PCh. 2 - Prob. 69PCh. 2 - (III) A toy rocket moving vertically upward passes...Ch. 2 - Prob. 71PCh. 2 - Prob. 72PCh. 2 - Prob. 73PCh. 2 - (III) Air resistance acting on a falling body can...Ch. 2 - Prob. 75GPCh. 2 - A person jumps from a fourth-story window 15.0 m...Ch. 2 - Prob. 77GPCh. 2 - Prob. 78GPCh. 2 - Prob. 79GPCh. 2 - Prob. 80GPCh. 2 - Consider the street pattern shown in Fig. 247....Ch. 2 - Prob. 82GPCh. 2 - Prob. 83GPCh. 2 - Prob. 84GPCh. 2 - Prob. 86GPCh. 2 - Prob. 87GPCh. 2 - In putting, the force with which a golfer strikes...Ch. 2 - Prob. 89GPCh. 2 - Prob. 91GPCh. 2 - Prob. 92GPCh. 2 - Prob. 93GPCh. 2 - Prob. 94GPCh. 2 - Prob. 95GPCh. 2 - Prob. 96GPCh. 2 - Prob. 97GPCh. 2 - Prob. 98GPCh. 2 - Prob. 99GPCh. 2 - Prob. 100GPCh. 2 - Prob. 101GPCh. 2 - Prob. 102GPCh. 2 - You are traveling at a constant speed vM, and...
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- (II) A driver is traveling 18.0 m/s when she sees a red light ahead. Her car is capable of decelerating at a rate of 3.65 m/s2 If it takes her 0.350 s to get the brakes on and she is 20.0 m from the intersection when she sees the light,will she be able to stop in time? How far from the beginning of the intersection will she be, and in what direction?arrow_forward(II) A car traveling 75km/h slows down at a constant 0.50 m/s2 just by “letting up on the gas.” Calculate (a) the distance the car coasts before it stops, (b) the time it takes to stop, and (c) the distance it travels during the first and fifth secondsarrow_forward(II) Roger sees water balloons fall past his window. He notices that each balloon strikes the sidewalk 0.83 s after passing his window. Roger’s room is on the third floor, 15 m above the sidewalk. (a) How fast are the balloons traveling when they pass Roger’s window? (b) Assuming the balloons are being released from rest, from what floor are they being released? Each floor of the dorm is 5.0 m high.arrow_forward
- (III) A bowling ball traveling with constant speed hits the pins at the end of a bowling lane 16.5 m long. The bowler hears the sound of the ball hitting the pins 2.80 s after the ball is released from his hands. What is the speed of theball, assuming the speed of sound is 340m/sarrow_forward(1) If you are driving 110 km/h along a straight road and you look to the side for 2.0 s, how far do you travel during this inattentive period?arrow_forward(I) A sprinter accelerates from rest to 9.00 m/s in 1.38 s. What is her acceleration in (a) m/s2; (b) km/h2?arrow_forward
- (III) An automobile traveling 95 km/h overtakes a 1.30-km- long train traveling in the same direction on a track parallel to the road. If the train's speed is 75 km/h, how long does it take the car to pass it, and how far will the car have traveled in this time? See Fig. 2–36. What are the results if the car and train are traveling in opposite directions? -1.30 km- v = 75 km/h sdesla sia i de das das v = 95 km/h vir FIGURE 2–36 Problem 16.arrow_forward1. (I) What must be your car's average speed in order to travel 235 km in 3.25 h? 2. (I) A bird can fly 25 km/h. How long does it take to fly 15 km? 3. (I) If you are driving 110 km/h along a straight road and you look to the side for 2.0 s, how far do you travel duringarrow_forward(II) A sports car accelerates approximately as shown in the velocity-time graph of Fig. 2–43. (The short flat spots in the curve represent manual shifting of the gears.) Estimate the car's average acceleration in (a) second gear and (b) fourth gear. 50 5th gear 4th gear 40 3rd gear 30 20 2nd gear 10 1st gear t (s) 0. 10 20 30 40 FIGURE 2–43 Problem 56. The velocity of a car as a function of time, starting from a dead stop. The flat spots in the curve represent gear shifts. (s/u)aarrow_forward
- (c) Tests reveal that a normal driver takes 0.75 s before he or she can react to a situation to avoid accident or collision. It takes about 3.00 s for a driver with having 0:10% of alcohol in his syst em to do the same. If such drivers are travelling on a straight road at 44:00 ft=s and their cars decelerates at 0:68 m-s, ded ermine the shortest st opping distance, d, for each from the moment they see the pedestrians. Refer to Figure 1. [1 m = 3.2808399 ft] 2arrow_forward65. Consider the street pattern shown in Fig. 2–46. Each inter- section has a traffic signal, and the speed limit is 40 km/h. Suppose you are driving from the west at the speed limit. When you are 10.0 m from the first intersection, all the lights turn green. The lights are green for 13.0 s each. (a) Calculate the time needed to reach the third stoplight. Can you make it through all three lights without stopping? (b) Another car was stopped at the first light when all the lights turned green. It can accelerate at the rate of 2.00 m/s² to the speed limit. Can the second car make it through all three lights without stopping? By how many seconds would it make it, or not make it? West O East 0000 Speed limit 40 km/h Your 10 m 50 m 70 m car 15 m 15 m 15 m FIGURE 2-46 Problem 65.arrow_forward(II) At highway speeds, a particular automobile is capable of an acceleration of 1.8m/s2 about At this rate, how long does it take to accelerate from 65km/h to 120km/h ?arrow_forward
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