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A ball is thrown onto a rough floor at an angle \( \theta \) (Figure 1) If it rebounds at an angle \( \phi \) and the coefficient of kinetic friction is \( \mu \), determine the coefficient of restitution \( e \). Neglect the size of the ball. Hint: Show that during impact, the average impulses in the \( x \) and \( y \) directions are related by \( I_{x}=\mu I_{y} \). Since the time of impact is the same, \( F_{x} \Delta t=\mu F_{y} \Delta t \) or \( F_{x}=\mu F_{y} \). Express your answer in terms of some or all of the variables \( \theta, \phi \), and \( \mu \). \( x \) Incorrect; Try Again; 9 attempts remaining The correct answer does not depend on: \( v 1, v 2 \)

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