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General
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Question

A metal sphere is hung by a string fixed to a wall. The sphere is pushed away from the wall by a stick. The forces acting on the sphere are shown in the second diagram. Which of the following statements is wrong

  1. P equals W tan invisible function application theta    
  2. Error converting from MathML to accessible text.    
  3. T to the power of 2 end exponent equals P to the power of 2 end exponent plus W to the power of 2 end exponent    
  4. T equals P plus W    

The correct answer is: T equals P plus W



    As the metal sphere is in equilibrium under the effect of three forces therefore Error converting from MathML to accessible text.
    From the figure T cos invisible function application theta equals W …(i)
    T sin invisible function application theta equals P (ii)
    From equation (i) and (ii) we get P equals W tan invisible function application theta
    and T to the power of 2 end exponent equals P to the power of 2 end exponent plus W to the power of 2 end exponent

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