Torque on the rod? Tesion in the Cable?

Posted on 2016-12-15 18:41:00 in Physics by ELIPSA

Dear all, recently I got a Question at school. And I really have no idea about that. Can someone help me out? (especially Question(d)) Thanks a lot. 


A uniform fishing rod of mass 2 kg and length 3 m is pivoted without friction at O as shown in Fig. 
A fish of mass 0.5 kg is attached at the end of the fishing rod, A. The fishing rod is maintained in 
equilibrium by a cable attached vertically to the rod at B, a point 1 m from O. 


(a) Calculate the torque on the rod about the pivot O due to the weight of the rod. 
(b) Calculate the torque on the rod about the pivot O due to the weight of the fish. 
(c) Calculate the magnitude of the tension in the cable BC. 
(d) Calculate the magnitude and direction of the force exerted on the pivot by the end O of the 
fishing rod.

 

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