00 100121902

4 seconds after passing the mean position.

10 A solid circular disc of mass 10 kg and radius 0.3m is rotating about its centre
with constant angular acceleration of 10 rad/s. Determine the torque acting on
the disc.

PART 13
(Answer one full question from each module, each question carries 14 marks)
Module-I

11 Two rollers each of weight 75 N are supported by an inclined plane and a
vertical wall. Find the reaction at the points of contact A, B, C. Assume all the
surfaces to be smooth. Fig. (Q 11a)

12 ABCD is a square of side 6 m. Forces acting along AB, BC, CD, DA, AC and
DB are 1.5 KN, 3 kN, 12 KN, 7.5 KN, 7.5V2 kN, 31/2 kN respectively. Find the
resultant force and resultant moment aboutD. Fig (Q11b)

A 15 ‏ا‎

‎B‏ تب
‎മ്‌‏

‎3 KN

‎32 kN

‏ہے
‏121
‎Fig. (Q 119) Fig. (Q 11b)‏
‎Module-II‏
‎a) What do you understand by the reactions at supports?‏ 13
‎Find the reactions at the supports of the beam given. A is a hinged support and B‏
‎is a roller support‏

‎8N 5N 13N
oo =
∎− − −

‎Im 1.5m 1.5m lm

‎14 Two wedges A and B are used to raise another block C weighing 1000 N as
shown in figure. Assuming coefficient of friction as 0.25 for all surfaces,
determine the value of P for impending upwards motion of C shown in fig (Q14)

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