# Civil Engineering - Applied Mechanics

### Exercise :: Applied Mechanics - Section 2

46.

Ball A of mass 250 g moving on a smooth horizontal table with a velocity of 10 m/s hits an identical stationary ball B on the table. If the impact is perfectly elastic, the velocity of the ball B just after impact would be

 A. zero B. 5 m/sec C. 10 m/sec D. none of these.

Explanation:

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47.

Equation of motion of a point in a straight line, is

 A. v = u + ft B. S = ut + ft2 C. 2fS = v2 - u2 D. all the above.

Explanation:

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48.

For the system of the loads shown in below figure, the time required for the 6.6 kg load to fall on the edge, is A. 1 sec. B. 2 sec. C. 3 sec. D. 4 sec. E. 5 sec.

Explanation:

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49.

One end of a light string 4 m in length is fixed to a point on a smooth wall and the other end fastened to a point on the surface of a smooth sphere of diameter 2.25 m and of weight 100 kg. The tension in the string is

 A. 17.5 kg B. 19.5 kg C. 22.5 kg D. 25 kg.

Explanation:

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50.

The inherent property of a body which offers reluctance to change its state of rest or uniform motion, is

 A. weight B. mass C. interia D. momentum.