TR-06_ENGR111A_2011C cables pulleys

TR-06_ENGR111A_2011C cables pulleys - CablesandPulleys....

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ENGR 111 Track A 1 Cables and Pulleys. Two force members.  Class 04-02
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2 Cables and Pulleys Cables/ropes support only tensile forces (you cannot push on a  rope!).  On FBDs, we will always show the direction of cable forces so that  positive values correspond to tension. Assumptions: cable does not stretch and has negligible weight.  Cables are often used with pulleys.  Pulleys change orientation of a cable. Thus they change direction  of the force the cable supports.  Assumptions: pulley is frictionless (its bearing has no friction).  Then the force supported by the cable is unchanged as it wraps  around the pulley. If a cable with negligible weight is wrapped around several  frictionless pulleys, the tension force is the same throughout the  cable. T
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TR-06_ENGR111A_2011C cables pulleys - CablesandPulleys....

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