# Civil Engineering - Applied Mechanics

### Exercise :: Applied Mechanics - Section 2

36.

The ends of a string weighing w/metre are attached to two points at the same horizontal level. If the central dip is very small, the horizontal tension of the string throughout is

 A. B. C. D.

Explanation:

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37.

If two forces P and Q (P > Q) act on the same straight line but in opposite direction, their resultant, is

 A. P + Q B. P/Q C. Q/P D. P - Q E. Q - P.

Explanation:

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38.

If the angle between the applied force and the direction of motion of a body, is between 90° and 180°, the work done, is called

 A. virtual work B. imaginary work C. zero work D. negative work.

Explanation:

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39.

The units of moment of inertia of an area, are

 A. kg/m B. kg/m2 C. m4 D. m3 E. kg-m2.

Explanation:

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40.

To avoid bending action at the base of a pier,

 A. suspension and anchor cables are kept at the same level B. suspension and anchor cables are fixed to pier top C. suspension cable and anchor cables are attached to a saddle mounted on rollers on top of the pier D. none the these.