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6.38 The coefficient of sliding friction between a 900-kg car and the pavement is 0.80. If the car is moving at 25 m/s along level pavement when it begins to skid to a stop, how far will it go before stopping? Ans. 40 m

6.38 The coefficient of sliding friction between a 900-kg car and the pavement is 0.80. If the car is moving at 25 m/s along level pavement when it begins to skid to a stop, how far will it go before stopping? Ans. 40 m

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6.38 The coefficient of sliding friction between a 900-kg car and the pavement is 0.80. If the car is moving at 25 m/s along level pavement when it begins to skid to a stop, how far will it go before stopping? Ans. 40 m Required Given m = 900 kg d = ? V = 25 m/s µ = 0.80 Solution F,- µ FN 2 mv Fd %3D 2 2 ( 25 m/s ) - ( 2 ( 0. 80 ) ( 9 8 m/s ) d %3D 312. 5 m/s (0. 80 ) ( 9. 8 m/s ) d 312. 5 m/s d (0. 80 ) (9. 8 m/s ) %3D d = (39.85969 (m/s or 40 m
Transcribed Image Text:6.38 The coefficient of sliding friction between a 900-kg car and the pavement is 0.80. If the car is moving at 25 m/s along level pavement when it begins to skid to a stop, how far will it go before stopping? Ans. 40 m Required Given m = 900 kg d = ? V = 25 m/s µ = 0.80 Solution F,- µ FN 2 mv Fd %3D 2 2 ( 25 m/s ) - ( 2 ( 0. 80 ) ( 9 8 m/s ) d %3D 312. 5 m/s (0. 80 ) ( 9. 8 m/s ) d 312. 5 m/s d (0. 80 ) (9. 8 m/s ) %3D d = (39.85969 (m/s or 40 m
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