740_Dynamics 11ed Manual

740_Dynamics 11ed Manual - Engineering Mechanics - Dynamics...

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Unformatted text preview: Engineering Mechanics - Dynamics Chapter 21 ⎛ IOx ⎞ ⎜⎟ ⎜ IOy ⎟ ⎜⎟ ⎜ IOz ⎟ ⎜ ωx ⎟ ⎜⎟ ⎜ ωy ⎟ = Find ( IOx , IOy , IOz , ωx , ωy , ωz , vx , vy , vz) ⎜ω ⎟ ⎜ z⎟ ⎜ vx ⎟ ⎜⎟ ⎜ vy ⎟ ⎜ vz ⎟ ⎝⎠ ⎛ IOx ⎞ ⎜⎟ Impulse = ⎜ IOy ⎟ ⎜I ⎟ ⎝ Oz ⎠ ⎛ ωx ⎞ ⎜⎟ ω = ⎜ ωy ⎟ ⎜ω ⎟ ⎝ z⎠ axis = ω ω ⎛ 8.57 ⎞ Impulse = ⎜ 0.00 ⎟ N⋅ s ⎜ ⎟ ⎝ 0.00 ⎠ ⎛ 0.00 ⎞ axis = ⎜ 0.14 ⎟ ⎜ ⎟ ⎝ −0.99 ⎠ *Problem 21-32 Rod AB has weight W and is attached to two smooth collars at its ends by ball-and-socket joints. If collar A is moving downward with speed vA when z = a , determine the speed of A at the instant z = 0. The spring has unstretched length c. Neglect the mass of the collars. Assume the angular velocity of rod AB is perpendicular to its axis. Given: W = 6 lb vA = 8 ft s a = 3 ft b = 6 ft c = 2 ft k=4 lb ft δ = 2 ft 738 ...
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