189_Physics ProblemsTechnical Physics

189_Physics ProblemsTechnical Physics - 7 CHAPTER OUTLINE...

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Unformatted text preview: 7 CHAPTER OUTLINE 7.1 Systems and Environments 7.2 Work Done by a Constant Force 7.3 The Scalar Product of Two Vectors 7.4 Work Done by a Varying Force 7.5 Kinetic Energy and the Work-Kinetic Energy Theorem 7.6 The Non-Isolated System—Conservation of 7.7 Situations Involving Kinetic Energy Friction 7.8 Power 7.9 Energy and the Automobile Energy and Energy Transfer ANSWERS TO QUESTIONS Q7.1 The force is perpendicular to every increment of displacement. Therefore, F r ⋅ = ∆ 0 . Q7.2 (a) Positive work is done by the chicken on the dirt. (b) No work is done, although it may seem like there is. (c) Positive work is done on the bucket. (d) Negative work is done on the bucket. (e) Negative work is done on the person’s torso. Q7.3 Yes. Force times distance over which the toe is in contact with the ball. No, he is no longer applying a force. Yes, both air friction and gravity do work. Q7.4 Force of tension on a ball rotating on the end of a string. Normal force and gravitational force on anForce of tension on a ball rotating on the end of a string....
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This note was uploaded on 12/14/2011 for the course PHY 203 taught by Professor Staff during the Fall '11 term at Indiana State University .

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