14-34. The spring bumper is used to arrest the motion of the 4-lb block, which is sliding toward it at v = 9 ft/s. As shown, the spring is confincd by the plate P and wall using cables so that its length is 1.5 ft. If the stiffness of the spring is k = 50 lb/ft, determine the required unstretched length of the spring so that the plate is not displaced more than 0.2 ft after the block collides into it. Neglect friction, the mass of the plate and spring, and the energy loss between the plate and block during the collision. -1.5 ft ft

Elements Of Electromagnetics
7th Edition
ISBN:9780190698614
Author:Sadiku, Matthew N. O.
Publisher:Sadiku, Matthew N. O.
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14-34. The spring bumper is used to arrest the motion of
the 4-lb block, which is sliding toward it at v = 9 ft/s. As
shown, the spring is confincd by the plate P and wall using
cables so that its length is 1.5 ft. If the stiffness of the spring
is k = 50 lb/ft, determine the required unstretched length
of the spring so that the plate is not displaced more than 0.2 ft
after the block collides into it. Neglect friction, the mass of
the plate and spring, and the energy loss between the plate
and block during the collision.
-1.5 ft
ft
Transcribed Image Text:14-34. The spring bumper is used to arrest the motion of the 4-lb block, which is sliding toward it at v = 9 ft/s. As shown, the spring is confincd by the plate P and wall using cables so that its length is 1.5 ft. If the stiffness of the spring is k = 50 lb/ft, determine the required unstretched length of the spring so that the plate is not displaced more than 0.2 ft after the block collides into it. Neglect friction, the mass of the plate and spring, and the energy loss between the plate and block during the collision. -1.5 ft ft
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