Theory of Structures - Engineering

Q1:

If normal stresses due to longitudinal and transverse loads on a bar are σ1 and σ2 respectively, the normal component of the stress on an inclined plane θ° to the longitudinal load, is

A σ1 sin θ x σ2 cos θ

B σ1 sin θ2 + σ2 cos2 θ

C

D

ANS:B - σ1 sin θ2 + σ2 cos2 θ

Correct answer is 61cos^2 @+62sin^2 @.