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9 A 6 kg mass is projected up a rough circular track (radius = 0.43 m, diameter = 0.86 m) as shown. The speed of the mass at point A is 9.55 m/s. What is the velocity of the mass at point B if friction does work W = −11.75 N? A. 70.49 m/s B. 9.31 m/s C. 2.42 m/s D. 8.4 m/s E. 5.94 m/s

9 A 6 kg mass is projected up a rough circular track (radius = 0.43 m, diameter = 0.86 m) as shown. The speed of the mass at point A is 9.55 m/s. What is the velocity of the mass at point B if friction does work W = −11.75 N? A. 70.49 m/s B. 9.31 m/s C. 2.42 m/s D. 8.4 m/s E. 5.94 m/s

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9 A 6 k g mass is projected up a rough circular track (radius = 0.43 m , diameter = 0.86 m ) as shown. The speed of the mass at point A is 9.55 m / s . What is the velocity of the mass at point B if friction does work W = − 11.75 N ? A. 70.49 m / s B. 9.31 m / s C. 2.42 m / s D. 8.4 m / s E. 5.94 m / s

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