Physics question: Determine the net torque on the 3.2-m-long uniform beam shown in the figure. All forces are shown. (Figure 1)?
A) Calculate about point C, the CM. Take counterclockwise torques to be positive.
B) Calculate about point point P at one end. Take counterclockwise torques to be positive.
Below is the recommendation and reference answer for question "Physics question: Determine the net torque on the 3.2-m-long uniform beam shown in the figure. All forces are shown. (Figure 1)?" It was collected and sorted by the editor of this site but not sure the answer is entirely accurate.
F1y = 56*cos 32 = 47.49 N
F1x = 56*sen 32 = 29.68 N
F2x = -32.5√2 N
F2y = 32.5√2 N
F3x = 52*cos32 = 44.10 N
F3y = -52*sin 32 = -27.56 N
around point C
F2 has 0 arm ..so it is uneffective
Mc = ℓ/2*(F1x-F3x) = 1.6*(29.68-44.10) = -23.1 Nm (i.e. ccw according to cartesian plan and posive according to your definition)
arounf point P
F3 has 0 arm ..so it is uneffective
Mp = (ℓ*F1x+ℓ/2*F2x) = (3.2*29.68-1.6*32.5√2) = 21.4 Nm (i.e. cw according to cartesian plan and negative according to your definition)
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