Physics-
General
Easy

Question

A solid cone hangs from a frictionless pivot at the origin O, as shown. If blank i comma blank stack j with hat on top andblank stack k with hat on top are unit vectors, and a, b, and c are positive constants, which of the following forces F applied to the rim of the cone at a point P results in a torque t on the cone with a negative component t Z ?

  1. F equals a stack k with hat on top comma P subscript 1 end subscript s left parenthesis 0 comma b comma negative c right parenthesis    
  2. F = –a stack k with hat on top, P is (0,–b,–c)    
  3. F = a stack j with hat on top, P is (–b,0,–c)    
  4. None    

The correct answer is: F equals a stack k with hat on top comma P subscript 1 end subscript s left parenthesis 0 comma b comma negative c right parenthesis

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