217_Dynamics 11ed Manual

217_Dynamics 11ed Manual - = P 1.677 lb = Problem 13-95 The...

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Engineering Mechanics - Dynamics Chapter 13 radians. If its angular rate of rotation θ ' is constant, determine the tangential force P needed to cause the motion and the normal force that the rod exerts on the spool at the instant θ = θ 1 . Given: W 2lb = 1 90 deg = ' 4 rad s = b 2f t = Solution: θθ 1 = rb = r' b ' = ψ atan r ' r' = Guesses N B 1lb = P 1lb = Given N B sin () P cos () + W g r ' 2 () = P sin () N B cos () + W g 2 r' ' () = N B P Find N B P , () = 57.52 deg = N B 4.771 lb
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Unformatted text preview: = P 1.677 lb = Problem 13-95 The collar of weight W slides along the smooth vertical spiral rod r = b , where is in radians. If its angular rate of rotation ' is constant, determine the tangential force P needed to cause the motion and the normal force that the rod exerts on the spool at the instant 1 . 215...
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