If the principal stresses in a plane stress problem are

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If the principal stresses in a plane stress problem are σ₁ = 100 MPa, σ₂ = 40 MPa, the magnitude of the maximum shear stress (in MPa) will be

1. 60
2. 50
3. 30
4. 20

Correct Option: C

Maximum shear stress,

τ_max =	σ₁ − σ₂
	2

=	10 − 40	=	60	= 30 MPa
	2		2