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The state of stress at a point in a component is represented by a Mohr’s circle of radius 100 MPa centered at 200 MPa on the normal stress axis. On a plane passing through the same point, the normal stress is 260 MPa. The magnitude of the shear stress on the same plane at the same point is ____ MPa.
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- 80 MPa
- 79 MPa
- 81 MPa
- 70 MPa
Correct Option: A
In triangle OAB,
OB² = OA² + AB²
⇒ 100² = 60² + AB²
⇒ AB² = 6400
AB = 80 MPa
∵ AB represents shear stress at the same point.
