एक ठोस आयताकार धरन (rectangular beam) के लिए, अधिकतम अपरूपण प्रतिबल (maximum shear stress) औसत अपरूपण प्रतिबल का कितना गुना होता है?

If the bending moment diagram of a beam is parabolic under a uniformly distributed load, what is the shape of the corresponding shear force diagram?

Which of the following gives the maximum shear stress in terms of the principal stresses σ1 and σ2 under plane stress conditions?