Solution Set 3

 

ENGR &215

Chapter 15 Sections 15.4 Solution Set # 3

confined to move within Problem 1  1  The slider block B is confined the smooth slot. It is connected to two springs, each of which has a stiffness stiffness of k = 30 N/m.They are originally stretched 0.5 m when s = 0 as shown. a) Determine the maximum distance, s max,  block B moves after it is hit by block A which is originally traveling at (v A ) 1  = 8m/s. Take e = 0.4 and the mass of each block to be 1.5 kg.  b) Determine the average net force between blocks A and B during impact if the impact occurs in 0.005 s.

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Problem 1 continued  continued 

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Problem 2 2   Two identical balls A and B of mass m  are suspended from cords of length L/2 and L, respectively. Ball A is released from rest when ø = 90 ° and swings down to ø  = 0°, where it strikes B. Determine the speed of each  ball just after impact and the maximum angle θ  through which B will swing. The coefficient of restitution between the balls is e.

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continued  Problem 2 continued 

slingshot, the boy fires fires the 0.2-lb Problem 3  3  Using a slingshot, marble at the concrete wall, striking it at B. If the coefficient of restitution between the marble and the wall is e = 0.5, determine the speed of the marble after it rebounds from the wall.

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Problem 3 continued

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