15-66. Block A, having a mass m, is released from rest,falls a distance h and strikes the plate B having a mass 2m. Itthe coefficient of restitution between A and Bis e, determinethe velocity of the plate just after collision. The spring has astiffness k.MW

The velocity of the block just before it hits the plate is

Answered: 15-66. Block A, having a mass m, is…

Elements Of Electromagnetics

7th Edition

ISBN:9780190698614

Author:Sadiku, Matthew N. O.

Publisher:Sadiku, Matthew N. O.

ChapterMA: Math Assessment

Section: Chapter Questions

Problem 1.1MA

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15-63. The four balls each have the same mass m. If A and B are rolling forward with velocity v and strike C, determine the velocity of each ball after the first three collisions. Take e=0.5 between each ball.
3/114 The 4-kg ball and the attached light rod rotate in en the vertical plane about the fixed axis at 0, If the assembly is released from rest at 0 = 0 and moves under the action of the 60-N force, which is main- %3D tained normal to the rod, determine the velocity v of the ball as e approaches 90°. Treat the ball as a o particle. 300 mm 4 kg 200 mm A its ninqe adi nadw 60 N
13-83. The ball has a mass m and is attached to the cord of length I. The cord is tied at the top to a swivel and the ball is given a velocity vo. Show that the angle 0 which the cord makes with the vertical as the ball travels around the circular path must satisfy the equation tan 0 sin 0 = v3/gl. Neglect air resistance and the size of the ball.
15-83. The 10-lb collar B is at rest, and when it is in the position shown the spring is unstretched. If another 1-lb collar A strikes it so that B slides 4 ft on the smooth rod before momentarily stopping, determine the velocity of A just after impact, and the average force exerted between A and B during the impact if the impact occurs in 0.002 s The coefficient of restitution between A and B is e=0.5. k = 20 lb/ft ? 3 ft
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57
14-67. The assembly consists of two blocks A and B which have a mass of 20 kg and 30 kg, respectively. Determine the speed of each block when B descends 1.5 m. TI1c blocks are released from rest. Neglect the mass of the pulleys and cords
15-67. The three balls each weigh 0.5 lb and have a coefficient of restitution of e = 0.85. If ball A is released from rest and strikes ball B and then ball B strikes ball C, determine the velocity of each ball after the second collision has occurred. The balls slide without friction. r= 3 ft
*15-28. The 20-kg crate is lifted by a force of F= (100+5²) N, where t is in seconds. Determine how high the crate has moved upward when t= 3 s, starting from rest.

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15-66. Block A, having a mass m, is released from rest, falls a distance h and strikes the plate B having a mass 2m. It the coefficient of restitution between A and Bis e, determine the velocity of the plate just after collision. The spring has a stiffness k. MW