# Civil Engineering - Applied Mechanics

### Exercise :: Applied Mechanics - Section 3

21.

A stone of mass 1 kg is tied to a string of length 1 m and whirled in a horizontal circle at a constant angular speed 5 rad/sec. The tension in the string is,

 A. 5 N B. 10 N C. 15 N D. 25 N E. None of these.

Explanation:

No answer description available for this question. Let us discuss.

22.

For a simple pendulum, time period for a beat, is

 A. πl/g B. π2l/g C. πg/2l D. πl/2g E. π2g/l.

Explanation:

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23.

The ratio of the moment of inertia of a rectangle about its centroidal axis to the moment of inertia about its base, is

 A. 1/4 B. 1/2 C. 3/4 D. 2.

Explanation:

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24.

The apparent weight of a man in a moving lift is less than his real weight when it is going down with

 A. uniform speed B. an acceleration C. linear momentum D. retardation.

Explanation:

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25.

P is the force acting on a body whose mass is m and acceleration is f. The equation P - mf = 0, is known as

 A. equation of dynamics B. equation of dynamic equilibrium C. equation of statics D. none of these.