A) \[0{}^\circ \]
B) \[30{}^\circ \]
C) \[90{}^\circ \]
D) none of these
Correct Answer: D
Solution :
Angle of contact is the angle between the tangent to the periphery of the point of contact with the solid, and the surface of the solid. \[\angle COB={{90}^{o}}+{{45}^{o}}={{135}^{o}}\] Given, \[{{F}_{A}}={{F}_{C}}\] Hence, OA makes an angle of\[67.5{}^\circ \]with OC and OB. \[\therefore \]Angle of contact\[={{67.5}^{o}}-{{45}^{o}}={{22.5}^{o}}\]You need to login to perform this action.
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