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Physics

Fluid-Mechanics

Easy

Question

n Column L a uniform bar of uniform cross-sectional area under the application of forces is shown in the figure and in Column II, some effects/phenomena are given. Match the entries of Column I with the entries of Column II.

Column - I

Column - II

i.
a.
Uniform stresses developed in the rod

ii.
b.
Non- uniform stresses developed in the rod

iii.
c.
Compressive stress developed

iv.
d.
Tensile stresses developed

$i \to a, d; i i \to a, c; i i i \to b, d; i v \to b, c$
$i \to a, c; i i \to a, d; i i i \to b, d; \dot{i} v \to b, c$
$i \to a, d; i i \to a, c; i i i \to c; \dot{i} v \to b, a$
$i \to a; i i \to b; i i i \to c; \dot{i} v \to b, a$

The correct answer is: $i not stretchy rightwards arrow a comma c semicolon i i not stretchy rightwards arrow a comma d semicolon i i i not stretchy rightwards arrow b comma d semicolon i with dot on top v not stretchy rightwards arrow b comma c$

Sol: For A and B, the rod is in equilibrium and hence internal restoring force developed per unit area across any cross-section is same and stress developed in the rod is uniform, while in C and D, the case is reverse.

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