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Applied Mechanics and Graphic Statics

Applied Mechanics and Graphic Statics
The moment of inertia of a circular lamina of diameter ‘d’, about an axis perpendicular to the plane of the lamina and passing through its centre, is

πd⁴/16
πd⁴/32
πd⁴/24
π/64 (D⁴ + d⁴)

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Applied Mechanics and Graphic Statics
A symmetrical body is rotating about its axis of symmetry, its moment of inertia about the axis of rotation being 2 kg -m2 and its rate of rotation 2 revolutions/see. The angular momentum of the body in kg-m2/sec is

4
6 7i
8TC
8

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Applied Mechanics and Graphic Statics
Pick up the incorrect statement from the following. In case of suspension bridge due to rise in temperature,

Dip of the cable decreases
Dip of the cable increases
Length of the cable increases
None of these

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Applied Mechanics and Graphic Statics
The forces which meet at one point and have their lines of action in different planes are called

Intersecting forces
Coplanar non-concurrent forces
Non-coplanar concurrent forces
Non-coplanar non-current forces

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Applied Mechanics and Graphic Statics
The resultant of two forces ‘P’ and ‘Q’ acting at an angle ‘θ’, is

P² + Q² + 2PQ tan θ
P² + Q² + 2PQ cos θ
√(P² + Q² + 2PQ cos θ)
P² + Q² + 2P sin θ

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Applied Mechanics and Graphic Statics
A body A of mass 6.6 kg which is lying on a horizontal platform 4.5 m from its edge is connected to the end of a light string whose other end is supporting a body of mass 3.2 kg as shown in below figure. If the friction between the platform and the body A is 1/3, the acceleration is

1.00 m/sec²
0.5 m/sec²
0.75 m/sec²
1.25 m/sec²

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