Page 1 - WS CH 11 CLASS XI

Work Sheet Ch-9 Class 11(Mechanical Properties of Solid)

1 A wire whose cross-section area is A 1 is stretched by L 1 by a certain weight. How far will a
wire of same material and same length and cross-section area A 2 stretch if same weight is
applied to it

2 A spring is stretched by applying a load to its free end. The strain produced in the spring is
(a) volumetric.
(b) shear.
(c) longitudinal and shear.
(d) longitudinal.
3 A mild steel wire of length 2L and cross-sectional area A is stretched, well within elastic limit,
horizontally between two pillar. A mass m is suspended from the mid point of the wire.Strain in
the wire is

(a) x / L
2
2
(b) x / 2L
2
(c) x / 2L
2
(d) x / L
4 The stress versus strain graphs for wires of two materials A and B are as shown in the figure.
If YA and YB are the Young 's modulii of the materials, then