A three-point bend test is performed on a block of silicon carbide that is 10 cm long,

Question:

A three-point bend test is performed on a block of silicon carbide that is 10 cm long, 1.5 cm wide, and 0.6 cm thick and is resting on two supports 7.5 cm apart. The sample breaks when a deflection of 0.09 mm is recorded. The flexural modulus for silicon carbide is 480 GPa. Assume that no plastic deformation occurs.
Calculate
(a) The force that caused the fracture; and
(b) The flexural strength.