The 50-lb block rests on the rough surface for which the coefficient of kinetic friction is μ = 0.2. A force F = (40+ s²) lb, where s is in ft, acts on the block in the direction shown. If the spring is originally unstretched (s = 0) and the block is at rest, determine the velocity at the instant the block has moved s = 1.5 ft. F 30° k = 20 lb/ft www

The 50-lb block rests on the rough surface for which the coefficient of kinetic friction is μ = 0.2. A force F = (40+ s²) lb, where s is in ft, acts on the block in the direction shown. If the spring is originally unstretched (s = 0) and the block is at rest, determine the velocity at the instant the block has moved s = 1.5 ft. F 30° k = 20 lb/ft www

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

The 50-lb block rests on the rough surface for
which the coefficient of kinetic friction is µ = 0.2.
A force F = (40+ s²) lb, where s is in ft, acts on the
block in the direction shown. If the spring is
originally unstretched (s = 0) and the block is at
rest, determine the velocity at the instant the block
has moved s = 1.5 ft.
F.
30°
4
k = 20 lb/ft

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(25 pts) The 50-lb block rests on the smooth surface. A force F = (40+s²) lb, which s is in ft, acts on the block in the direction shown. If the spring is originally unstretched (s = 0) and the block is at rest, determine the power developed by the force the instant the block has moved s = 1.5 ft. F. 30° k = 20 lb/ft wwwwww
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