Explanation 1) Concept: Using the law of conservation of momentum and writing the final speed of the car in terms of final speed of man and car, we can find the final speed of the flatcar and then the resulting increase in the speed of the flatcar. 2) Formula: P i = P f 3) Given: i) Speed of the man v m f = 4.0 m / s ii) Speed of the flat car v c = 18.2 m / s iii) Weight of the man w = 915 k g iv) Weight of the car W = 2415 k g 4) Calculation: From conservation of momentum, W g + w g v c = W g v + w g v - v m f Multiply above equation by ‘g’, we get, W + w v f = W v + w ( v - v m f ) 2415 k g + 915 k g 18

11th Edition

ISBN: 9781119573913

Author: Halliday

Publisher: WILEY

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Chapter 9, Problem 122P

To determine

To Find:

The resulting increase in the speed of the car

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Chapter 9, Problem 121P

Chapter 9, Problem 123P

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