13 Determine the force P required to move the wedge downwards as shown in Fig.6. (10)
Angle of friction is 15° for all the surfaces.

۲

2.5 KN

Fig.6

14 a) State thetheorems of Pappus and Guldinus. Illustrate it with the determination of (5)
(a) surface area of a cylinder ( Radius R and Length L) (b) Volume of a sphere
of radius R.
b) Determine the support reactions for the beam shown inFig.7by applying principle (5)
of virtual work.

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