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A metal sphere is hung by a string fixed...

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?

A

`P=Wtanphi`

B

`vacT+vacP+vacW=0`

C

`T^(2)=P^(2)+W^(2)`

D

T=P+W

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