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Unformatted text preview: Engineering Mechanics - Dynamics Chapter 17 ⎛T⎞
⎜ A ⎟ = Find ( T , N , α , a )
⎝ aG ⎠ aG = 1.395 m α = 4.65 2 s rad
2 T = 359 N s *Problem 17-100
A uniform rod having weight W is pin-supported at A from a roller which rides on horizontal track. If
the rod is originally at rest, and horizontal force F is applied to the roller, determine the acceleration of
the roller. Neglect the mass of the roller and its size d in the computations.
W = 10 lb
F = 15 lb
l = 2 ft
ft g = 32.2 2 s
Solution: aG = 1 Guesses ft
2 aA = 1 s ft
2 α=1 s rad
2 s Given
F= ⎛ W ⎞a
⎝g⎠ aA = aG + α ⎛ l ⎞ = 1 ⎛ W ⎞ l2 α
⎝ 2 ⎠ 12 ⎝ g ⎠ F⎜
2 ⎛ aG ⎞
⎜ aA ⎟ = Find ( aG , aA , α )
aG = 48.3 ft
2 s α = 145 rad
2 aA = 193 s ft
2 s Problem 17-101
A uniform rod having weight W is pin-supported at A from a roller which rides on horizontal track.
Assume that the roller at A is replaced by a slider block having a negligible mass. If the rod is initially
at rest, and a horizontal force F is applied to the slider, determine the slider’s acceleration. The
coefficient of kinetic friction between the block and the track is μ k. Neglect the dimension d and the
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This note was uploaded on 08/16/2011 for the course EGN 3321 taught by Professor Christianfeldt during the Spring '08 term at University of Central Florida.
- Spring '08