anonymous
  • anonymous
The diagram below represents a cylinder supported at its centre (at the black dot). The forces acting on the cylinder are the normal force, weight, and tension. With the pivot at the centre, which of the forces apply a non-zero torque? Explain.
Physics
  • Stacey Warren - Expert brainly.com
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SOLVED
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chestercat
  • chestercat
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anonymous
  • anonymous
|dw:1332815915779:dw|
anonymous
  • anonymous
The definition of torque is\[\tau = r \times F\]or more simply\[\tau = F \cdot d\]which force has a perpendicular distance greater than zero from the "black dot?"
anonymous
  • anonymous
weight?

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anonymous
  • anonymous
Doesn't weight act through the black dot?
anonymous
  • anonymous
Fnormal
anonymous
  • anonymous
if distance from rotation center is zero, then torque is zero
anonymous
  • anonymous
Now you're just guessing. Perhaps this figure will help. |dw:1332816295298:dw|Notice how the force of tension acts off center from the center of the cylinder.
anonymous
  • anonymous
oh! if i take my pivot at the center then W and N will have zero torque,right ? :)
anonymous
  • anonymous
Correct. Notice that your problem statement states that the pivot is the center of the cylinder.
anonymous
  • anonymous
yeah! now i got that clearly,didnt understand the question at 1st.thanks alot

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