39. We use Eq. 29-13 and the superposition of forces: GGGGFFFF4 142434=++. With θ= 45°, the situation is as shown on the right. The components of GF4are given by 22200044342cos 453cos24xiiiFFFaaaµµµ°=−−−πππand 20142sin 45sin.yiFa°=−=πThus, ()12220444410 4T m A7.50A31044440.135m1.32 10 N/mxyiaπ−⎡⎤×⋅⎛⎞⎛⎞⎢⎥=+=−+==⎜⎟⎜⎟⎝⎠⎝⎠⎣⎦=×−7π10πand GF4makes an angle φwith the positive xaxis, where =FHGIKJF
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This note was uploaded on 06/03/2011 for the course PHY 2049 taught by Professor Any during the Spring '08 term at University of Florida.