question archive Find TA, the tension in string A
Find TA, the tension in string A
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Find TA, the tension in string A. Express your answer in newtons using three significant figures A Bar Suspended by Two Vertical Strings The figure (Figure 1) shows a model of a crane that may be mounted on a truck.A rigid uniform horizontal bar of mass m185.0 kg and length L 5.70 m is supported by two vertical massless strings. String A is attached at a distance d1.50 m from the left end of the bar and is connected to the top plate. String B is attached to the left end of the bar and is connected to the floor. An object of mass m2 2000 kg is supported by the crane at a distance z 5.50 m from the left end of the bar Hints Throughout this problem, positive torque is TA78700 Figure 1 of 1 Submit My Answers Give Up Incorrect; Try Again; 9 attempts remaining in TI Part B Find TB, the magnitude of the tension in string B Express your answer in newtons using three significant figures Hints ?? AZd
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a)
sum torques about left end
-TA*d + m1g(L/2 )+ m2gx = 0
-TA*1.5 + 85*9.8*(5.7/2) + 2000*9.8*5.5=0
TA=73449.4 N
b) sum forces in the y
TA - TB - m1g - m2g = 0
TB = TA - m1g - m2g = 73449.4 - 85*9.8 - 2000*9.8
TB=53016.4N
