Q9.11Multiple correct
A rod of length l and negligible mass is suspended at its two ends by two wires of steel (wire A) and aluminium (wire B) of equal lengths (Fig. 9.4). The cross-sectional areas of wires A and B are 1.0 mm2 and 2.0 mm2, respectively. (Y Al = 70 × 109 Nm −2 and Ysteel = 200 × 109 Nm –2 ) A B steel Al Fig. 9.4 Mechanical Properties of Solids
This question refers to a figure in the original PDF.
- (a)Mass m should be suspended close to wire A to have equal stresses in both the wires.
- (b)Mass m should be suspended close to B to have equal stresses in both the wires.
- (c)Mass m should be suspended at the middle of the wires to have equal stresses in both the wires.
- (d)Mass m should be suspended close to wire A to have equal strain in both wires.