B2B109 Pages: 3

20kN
^

/
‏لے‎ ಜ್‌ 11 # 20°

1.5m

Determine the reactions at supports for the beam. (10)

SET 11
Each question carries 10 marks.
12.a. Calculate the moment of inertia and radius of gyration about X axis for the
sectioned area.

=

30mm
07 ಹ m
__* 5 न டம.

1 40mm 40mm ‏ام‎ x

b. An area ‘A’ has the following properties, 15 6.4x10° mm‘, I= 16x] 0° നന്‌ and

(7)

hy = 6.4x10° mm‘. Calculate maximum and minimum principal moment of inertia. (3)
13.3. A ladder 5 m long and weighing 260 N is placed against a vertical wall at an
inclination of 30° with wall. A man weighing 780 N climbs the ladder. When he is at
a distance of 1.64 m along the ladder from lower end, the ladder slips. What is the
coefficient of friction assuming it to be same for all contact surfaces? (5)
b. A simply supported beam of span 5 m is loaded with a concentrated load of 4kN at
a distance of 1 m from right end. The beam is also loaded with a uniformly distributed
load of 2kN/m length over a distance of 2m from the left end of the beam. Find the

reactions at the supports of the beam using principle of virtual work. (5)
14. ೩. Explain with sketches how the forces involved in the lifting of a load by a wedge

are analysed. (5)

b. Determine the product of inertia of the sectioned area about the X-Y axis. (5)

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