A192004 Pages: 4

b) Find the reaction at D for the beam shown in figure using principle of virtual

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SET 111
(ANSWER ANY 2 QUESTIONS : 2 X 10 = 20 MARKS)

Two weights of 50 N and 10 N are connected by a weightless string which passes
over a smooth pulley.The weight 10 N is resting on an inclined plane which
makes an angle of 20° with horizontal and another weight 50 N hangs vertically
downwards. Find the acceleration of the system, tension in the string and
distance moved by the body in 3 seconds starting from rest. Take coefficient of
friction as 0.2 for inclined plane and "8' as 9.81 m/s’.

A particle with SHM,performs 10 complete oscillation per minute and its speed
is 60 % of the maximum speed when it is at a distance of 8 cm from the centre of
oscillation.Find the amplitudesmaximum acceleration and also the speed of the
particle when it is 6 cm far from the centre of oscillation.

The bob of mass 1 kg of a simple pendulum of length ‘L’ metres rotates in a
horizontal circular path of radius 0.25 m with uniform speed. Find the time for
one complete rotation.

Two bodies of different weights are connected to the two ends of a light
inextensible spring which passed over a smooth pulley. If the acceleration of the
system is 3 m/s? and bigger weight is 60 N, determine i) The smaller weight.

ii)Tension in the string (Take g=9.8 m/s?)

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