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

  1.  i not stretchy rightwards arrow a comma d semicolon i i not stretchy rightwards arrow a comma c semicolon i i i not stretchy rightwards arrow b comma d semicolon i v not stretchy rightwards arrow b comma c
  2. 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
  3. i not stretchy rightwards arrow a comma d semicolon i i not stretchy rightwards arrow a comma c semicolon i i i not stretchy rightwards arrow c semicolon i with dot on top v not stretchy rightwards arrow b comma a
  4. i not stretchy rightwards arrow a semicolon i i not stretchy rightwards arrow b semicolon i i i not stretchy rightwards arrow c semicolon i with dot on top v not stretchy rightwards arrow b comma 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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