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Applied Mechanics and Graphic Statics

Applied Mechanics and Graphic Statics
A system of coplanar forces acting on a rigid body can be reduced to

One force only
None of these
One couple only
One force and one couple only

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Applied Mechanics and Graphic Statics
The member forces in a statically in determinate truss

May be obtained by graphic statics
Can be obtained by graphic statics
Can be obtained by graphic statics by trial and error
Cannot be obtained by graphic statics

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Applied Mechanics and Graphic Statics
A disc of mass 4 kg, radius 0.5 m and moment of inertia 3 kg.m² rolls on a horizontal surface so that its center moves with speed 5 m/see. Kinetic energy of the disc is

400 J
150 J
50 J
200 J

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Applied Mechanics and Graphic Statics
A body of weight 14 g appears to weight 13 g when weighed by a spring balance in a moving lift. The acceleration of the lift at that moment was

0.5 m/sec²
1 m/sec²
0.7 m/sec²
1 cm/sec²

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Applied Mechanics and Graphic Statics
If ‘v’ and ‘ω’ are linear and angular velocities, the centripetal acceleration of a moving body along the circular path of radius ‘r’, will be

v²/r
r/ω²
r/v²
ω²/r

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Applied Mechanics and Graphic Statics
A shell of mass 100 kg travelling with a velocity of 10 m/sec breaks into two equal pieces during an explosion which provides an extra kinetic energy of 20000 Joules. If the pieces continue to move in the same direction as before, then the speed of the faster one must be

30 m/sec
50 m/sec
20 m/sec
40 m/sec

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