5th Edition

ISBN: 9780321992277

Author: GIANCOLI

Publisher: PEARSON

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Textbook Question

Chapter 9.2, Problem 1EE

Return to the Chapter-Opening Questions, page 214, and answer them again now. Try to explain why you may have answered differently the first time.

CHAPTER-OPENING QUESTIONS—Guess now!

1. A railroad car loaded with rocks coasts on a level track without friction. A worker on board starts throwing the rocks horizontally backward from the car. Then what happens?
1. (a) The car slows down.
2. (b) The car speeds up.
3. (c) First the car speeds up and then it slows down.
4. (d) The car’s speed remains constant.
5. (e) None of these.
2. Which answer would you choose if the rocks fall out through a hole in the floor of the car, one at a time?

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Chapter 9.2, Problem 1DE

Chapter 9.8, Problem 1FE

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Race car driver is cruising down the street at a constant speed of 28.9 m/s (~65 mph; he has a “lead” foot) when the traffic light in front of him turns red. a) If the driver’s reaction time is 160 ms, how far does he and his car travel down the road from the instant he sees the light change to the instant he begins to slow down? b) If the driver’s combined reaction and movement time is 750 ms, how far do he and his car travel down the road from the instant he sees the light change to the instant he slams on her brakes and car begins to slow down? Please answer parts a-B. Show all work. For each question draw a diagram to show the vector/s. Show all the step and provide units in the answers. Provide answer to 2 decimal places. DONT FORGET TO DRAW VECTORS! ONLY USE BASIC FORMULAS TAUGHT IN PHYSICS. distance = speed * time.

Race car driver is cruising down the street at a constant speed of 28.9 m/s (~65 mph; he has a “lead” foot) when the traffic light in front of him turns red. a) If the driver’s reaction time is 160 ms, how far does he and his car travel down the road from the instant he sees the light change to the instant he begins to slow down? b) If the driver’s combined reaction and movement time is 750 ms, how far do he and his car travel down the road from the instant he sees the light change to the instant he slams on her brakes and car begins to slow down? c) If the driver’s average rate of acceleration is -9.5 m/s2 as he slows down, how long does it take him to come to a stop (use information about his speed of 28.9 m/s but do NOT use his reaction and movement time in this computation)? Please answer parts a-c. Show all work. For each question draw a diagram to show the vector/s. Show all the step and provide units in the answers. Provide answer to 2 decimal places unless stated otherwise.…

How is it that part a is connected to part b? I can't seem to solve either part and don't see the connection between the two.

Chapter 9 Solutions

PHYSICS F/SCI.+ENGINEERS W/MOD.PHYSICS

Ch. 9.1 - Prob. 1AE Ch. 9.1 - Light carries momentum, so if a light beam strikes...Ch. 9.2 - In Example 93, what result would you get if (a)...Ch. 9.2 - Prob. 1DE Ch. 9.2 - Return to the Chapter-Opening Questions, page 214,...Ch. 9.8 - Calculate the CM of the three people in Example...Ch. 9.8 - Prob. 1GE Ch. 9.9 - A woman stands up in a rowboat and walks from one...Ch. 9 - We claim that momentum is conserved. Yet most...Ch. 9 - A light object and a heavy object have the same...

Ch. 9 - When a person jumps from a tree to the ground,...Ch. 9 - Prob. 4Q Ch. 9 - Explain, on the basis of conservation of momentum,...Ch. 9 - Prob. 6Q Ch. 9 - If a falling ball were to make a perfectly elastic...Ch. 9 - Prob. 8Q Ch. 9 - It is said that in ancient times a rich man with a...Ch. 9 - The speed of a tennis ball on the return of a...Ch. 9 - Is it possible for an object to receive a larger...Ch. 9 - How could a force give zero impulse over a nonzero...Ch. 9 - In a collision between two cars, which would you...Ch. 9 - Prob. 14Q Ch. 9 - Prob. 15Q Ch. 9 - At a hydroelectric power plant, water is directed...Ch. 9 - A squash hall hits a wall at a 45 angle as shown...Ch. 9 - Prob. 18Q Ch. 9 - Why can a batter hit a pitched baseball farther...Ch. 9 - If a 20-passenger plane is not full, sometimes...Ch. 9 - Prob. 21Q Ch. 9 - Why is the CM of a 1-m length of pipe at its...Ch. 9 - Describe an analytic way of determining the CM of...Ch. 9 - Prob. 24Q Ch. 9 - Bob and Jim decide to play tug-of-war on a...Ch. 9 - Prob. 26Q Ch. 9 - Prob. 27Q Ch. 9 - Prob. 28Q Ch. 9 - Prob. 29Q Ch. 9 - Prob. 30Q Ch. 9 - At a carnival game you try to knock over a heavy...Ch. 9 - Prob. 1MCQ Ch. 9 - Prob. 3MCQ Ch. 9 - Prob. 4MCQ Ch. 9 - Prob. 5MCQ Ch. 9 - Prob. 6MCQ Ch. 9 - Prob. 7MCQ Ch. 9 - Prob. 8MCQ Ch. 9 - Prob. 9MCQ Ch. 9 - Prob. 10MCQ Ch. 9 - Prob. 11MCQ Ch. 9 - Prob. 12MCQ Ch. 9 - Prob. 13MCQ Ch. 9 - Prob. 1P Ch. 9 - Prob. 2P Ch. 9 - Prob. 3P Ch. 9 - Prob. 4P Ch. 9 - Prob. 5P Ch. 9 - Prob. 6P Ch. 9 - Prob. 7P Ch. 9 - Prob. 8P Ch. 9 - Prob. 9P Ch. 9 - Prob. 10P Ch. 9 - Prob. 11P Ch. 9 - Prob. 13P Ch. 9 - Prob. 14P Ch. 9 - Prob. 15P Ch. 9 - Prob. 16P Ch. 9 - Prob. 17P Ch. 9 - Prob. 18P Ch. 9 - Prob. 19P Ch. 9 - Prob. 20P Ch. 9 - Prob. 21P Ch. 9 - Prob. 22P Ch. 9 - (II) Suppose the force acting on a tennis hall...Ch. 9 - (II) The force on a bullet is given by the formula...Ch. 9 - (II) (a) A molecule of mass m and speed v strikes...Ch. 9 - Prob. 26P Ch. 9 - Prob. 27P Ch. 9 - Prob. 28P Ch. 9 - Prob. 29P Ch. 9 - Prob. 30P Ch. 9 - Prob. 31P Ch. 9 - Prob. 32P Ch. 9 - Prob. 33P Ch. 9 - Prob. 34P Ch. 9 - Prob. 35P Ch. 9 - Prob. 36P Ch. 9 - (I) In a ballistic pendulum experiment, projectile...Ch. 9 - Prob. 38P Ch. 9 - Prob. 39P Ch. 9 - Prob. 40P Ch. 9 - Prob. 41P Ch. 9 - Prob. 42P Ch. 9 - Prob. 43P Ch. 9 - Prob. 44P Ch. 9 - Prob. 45P Ch. 9 - Prob. 46P Ch. 9 - Prob. 47P Ch. 9 - Prob. 48P Ch. 9 - Prob. 49P Ch. 9 - (II) A neutron collides elastically with a helium...Ch. 9 - Prob. 51P Ch. 9 - (III) A neon atom (m = 20.0 u) makes a perfectly...Ch. 9 - Prob. 53P Ch. 9 - (I) The distance between a carbon atom (m = 12 u)...Ch. 9 - Prob. 55P Ch. 9 - Prob. 56P Ch. 9 - (II) Three cubes, of side l0,2l0, and 3l0 are...Ch. 9 - Prob. 58P Ch. 9 - Prob. 59P Ch. 9 - Prob. 60P Ch. 9 - Prob. 61P Ch. 9 - Prob. 62P Ch. 9 - Prob. 63P Ch. 9 - (III) Determine the CM of a uniform pyramid that...Ch. 9 - (II) The masses of the Earth and Moon are 5.98 ...Ch. 9 - Prob. 66P Ch. 9 - Prob. 67P Ch. 9 - Prob. 68P Ch. 9 - Prob. 69P Ch. 9 - Prob. 70P Ch. 9 - Prob. 71P Ch. 9 - Prob. 72P Ch. 9 - Prob. 73P Ch. 9 - Prob. 74P Ch. 9 - Prob. 76P Ch. 9 - Prob. 77GP Ch. 9 - Prob. 78GP Ch. 9 - Prob. 79GP Ch. 9 - Prob. 80GP Ch. 9 - Prob. 81GP Ch. 9 - Prob. 82GP Ch. 9 - Prob. 83GP Ch. 9 - Prob. 84GP Ch. 9 - Prob. 85GP Ch. 9 - Prob. 86GP Ch. 9 - Prob. 88GP Ch. 9 - Prob. 92GP Ch. 9 - Prob. 94GP Ch. 9 - Prob. 95GP Ch. 9 - Prob. 96GP Ch. 9 - Prob. 97GP Ch. 9 - A massless spring with spring constant k is placed...Ch. 9 - Prob. 99GP Ch. 9 - The gravitational slingshot effect. Figure 955...Ch. 9 - Prob. 101GP Ch. 9 - Prob. 102GP Ch. 9 - Prob. 103GP Ch. 9 - Prob. 104GP

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