8 Problem 8 Consider A Rigid Steel Beam Of Length L 14 5 M And Mass M 394 Kg Resting On Two Supports One At Eac 1 (48.61 KiB) Viewed 54 times
(8%) Problem 8: Consider a rigid steel beam of length L = 14.5 m and mass m = 394 kg resting on two supports, one at each end. A worker of mass m = 78 kg sits on the beam at a distance x from support A. Refer to the figure, though note that it is not drawn to scale. Grade Summary ▷ A 33% Part (a) Enter an expression for the force support B must exert on the beam in order for it to remain at rest, in terms of defined quantities, x, and g. FB = Deductions Potential В 0 h m n Submit Y d 1 mp P Hint π g L mw X ( 7 8 9 HOME 4 5 6 12 0 3 + | - END NO BACKSPACE DEL CLEAR L Feedback I give up! 0% 100% Submissions Attempts remaining: 3 (4% per attempt) detailed view
A 33% Part (b) When the worker sits at a distance x = 1.5 m from support A, calculate the force, in newtons, that support B must exert on the beam in order for it to remain at rest. Use g with three significant figures. A 33% Part (c) The force exerted on the beam by support A is measured and found to be FA = 2150 N. At what distance x, in meters, from support A is the worker sitting now?
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