Mechanical Engineering Principles

54 MECHANICAL ENGINEERING PRINCIPLES

4. If the Young’s modulus is doubled in
   the members of a pin-jointed truss, and
   the external loads remain the same, the
   internal forces in the truss will:

(a) double (b) halve

(c) stay the same

5. If the Young’s modulus is doubled in the
   members of a pin-jointed truss, and the
   loads remain the same, the deflection of
   the truss will:

(a) double (b) halve

(c) stay the same

6. If the external loads in a certain truss are
   doubled, the internal forces will:

(a) double (b) halve

(c) stay the same

References

[1] CASE, J, LORD CHILVER and ROSS, C.T.F.

‘Strength of Materials and Structures’Butter-

worth/Heinemann, 1999

[2] ROSS, C.T.F., ‘Mechanics of Solids’,Hor-

wood Publishing Ltd, 1999