*15-4. Each of the cables can sustain a maximum tensionof 5000 lb. If the uniform beam has a weight of 5000 lb,determine the shortest time possible to lift the beam with aspeed of 10 ft/s starting from rest.4 ft- 3 ft-3 ft-F15-7. The freight cars A and B have a mass of 20 Mg and15 Mg, respectively. Determine the velocity of A aftercollision if the cars collide and rebound, such that B movesto the right with a speed of 2 m/s. If A and B are in contactfor 0.5 s, find the average impulsive force which actsbetween them.3 m/s1.5 m/sB F15-13. Determine the coefficient of restitution e betweenball A and ball B. The velocities of A and B before and afterthe collision are shown.8m/s2 m/sABBefore collision1m/s9 m/sABAfter collision

15-4 The free body diagram of the cables is as follows: Calculate the forces in the vertical…

*15-4. Each of the cables can sustain a maximum tension of 5000 lb. If the uniform beam has a weight of 5000 lb, determine the shortest time possible to lift the beam with a speed of 10 ft/s starting from rest.

*15-4. Each of the cables can sustain a maximum tension of 5000 lb. If the uniform beam has a weight of 5000 lb, determine the shortest time possible to lift the beam with a speed of 10 ft/s starting from rest.

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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Question

*15-4. Each of the cables can sustain a maximum tension
of 5000 lb. If the uniform beam has a weight of 5000 lb,
determine the shortest time possible to lift the beam with a
speed of 10 ft/s starting from rest.
4 ft
- 3 ft-
3 ft-
F15-7. The freight cars A and B have a mass of 20 Mg and
15 Mg, respectively. Determine the velocity of A after
collision if the cars collide and rebound, such that B moves
to the right with a speed of 2 m/s. If A and B are in contact
for 0.5 s, find the average impulsive force which acts
between them.
3 m/s
1.5 m/s
B

F15-13. Determine the coefficient of restitution e between
ball A and ball B. The velocities of A and B before and after
the collision are shown.
8m/s
2 m/s
A
B
Before collision
1m/s
9 m/s
A
B
After collision

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