Civil Engineering
Applied Mechanics

Sections

1.  The angles between two forces to make their resultant a minimum and a maximum respectively are
 A. 0° and 90° B. 180° and 90° C. 90° and 180° D. 180° and 0°

2.  A block in the shape of a parallelopiped of sides lm x 2m x 3m lies on the surface. Which of the faces gives maximum stable block ?
 A. 1 m x 2 m B. 2 m x 3 m C. 1 m x 3m D. equally stable on all faces

3.  A rod AB carries three loads of 30 N, 70 N and 100 N at distances of 20 mm, 90 mm and 150 mm respectively from A.Neglecting the weight of the rod, the point at which the rod will balance is
 A. 109.5 mm from A B. 119.5 mm from A C. 125.5 mm from A D. 132.5 mm from A

4.  When two forces, each equal to P, act at 90° to each other, then the resultant will be
 A. P B. PV2 C. P/V2 D. 2P

5.  If the resultant of two forces has the same magnitude as either of the force, then the angle between the two forces is
 A. 30° B. 45° C. 60° D. 120°