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13 a)

NSA192004 Pages:4
PART B
(Answer one full question from each module, each question carries 14 marks)
Module-I

A rope 9m long is connected at A and B, two points on the same level, 8m apart. A
load of 300N is suspended from a point C on the rope, 3m from A. What load
connected to a point D, on the rope, 2m from B is necessary to keep portion CD
parallel to AB.

Concurrent forces of 1,3,5,7,9,11 N are applied to the center of a regular hexagon
acting towards its vertices as shown in fig 2. Determine the magnitude and direction
of the resultant.

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Fig 2
A uniform wheel 60 cm diameter weighing 1000 N rests against a rectangular
obstacle 15 cm height as shown in fig 3. Find the least force required which when
acting through the centre of the wheel will just turn the wheel over the corner of the
block.
The system of connected flexible cables shown in Fig.4 is supporting two loads of
550 N and 600 N at points B and D, respectively. Determine the tensions in the
various segments of the cable.

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300

Fig 3 Fig 4
Module-II

Find the force required to move a load of 30N up a rough inclined plane, applied
parallel to the plane. The inclination of the plane is such that when the same body is
kept on a perfectly smooth plane inclined at an angle, a force of 6N applied at an

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