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19.4 Eccentric Impact* To solve this problem, 2 equations are needed. The 1 st equation is the conservation of angular momentum. The 2 nd equation is using the definition of the coefficient of restitution, e, which is the ratio of the restitution impulse to the deformation impulse. (+ ) B A 2 1 A B 2 1 Copyright © 2010 Pearson Education South Asia Pte Ltd 19.4 Eccentric Impact* Copyright © 2010 Pearson Education South Asia Pte Ltd
Example 19.8 The 5-kg slender rod is suspended from the pin at A. If a 1-kg ball B is thrown at the rod and strikes its center with a horizontal velocity of 9 m/s, determine the angular velocity of the rod just after impact. The coefficient of restitution is e = 0.4 Copyright © 2010 Pearson Education South Asia Pte Ltd Example 19.8 Solution Conservation of Angular Momentum Angular momentum is conserved about point A since the impulsive force between the rod and the ball is internal. The weights of the ball and rod are non-impulsive. Copyright © 2010 Pearson Education South Asia Pte Ltd
Page 1 and 2: Engineering Mechanics: Dynamics in
Page 3 and 4: 19.1 Linear and Angular Momentum An
Page 5 and 6: 19.1 Linear and Angular Momentum Tr
Page 7 and 8: Example 19.1 At a given instant the
Page 9 and 10: 19.2 Principle of Impulse and Momen
Page 15 and 16: Example 19.2 Solution Principle of
Page 17 and 18: Example 19.4 Solution Cylinder Kine
Page 19 and 20: 19.3 Conservation of Momentum Proce
Page 21: Example 19.6 Solution Conservation

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