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Published byWilfrid Gordon Modified over 9 years ago
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Torque
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Center of Gravity The point at which all the weight is considered to be concentrated The point at which an object can be lifted w/o producing rotation
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Center of Gravity In asymmetric objects, the center of gravity may not be the geometric center
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Translational Equilibrium Occurs when an object is not accelerating
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Rotational Equilibrium Occurs when an object is not rotating or the rotation is uniform
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Torque The rotational effect of an object produced by a net force that is not applied to the center of gravity
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WAWA WBWB A B C Torque arm C = Pivot Point or Center of rotation FTFT
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Pivot Point Reference point from which to measure rotational forces
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Torque Arm The length between the pivot point and the point where a force is applied
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Torque The product of the applied force and the length of its torque arm:
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WAWA WBWB A B C Torque arm 6 m 4 m FTFT Torque A = W A x 6 m Torque B = W B x 4 m
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Torque Arm A WAWA WBWB Torque Arm B A B Torque A = W A Acos Torque B = W B Bcos FTFT
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FAFA FNFN F N = F A sin l sin Torque =F A l sin
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Calculate the torque on a 250 cm rod with a pivot point at one end and a 500.0 g object sitting on the other end
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A person ties a rope to one end of a 10.0 m I- beam & tries lift it by pulling with 2500 N at 37 o from horizontal
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