How far from the fulcrum should a 60 kg mass be placed in order to produce a torque of 90 mN ?

Question

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Answer 1

Torque =  r x F

 

|F| =  mg =  60 * 10 N = 600 N ( assuming g ~ 10m/s^2)

 

distance of fulcrum = torque / Force = 90/600 m = .15 m.