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Applied Mechanics and Graphic Statics

Applied Mechanics and Graphic Statics
The moment of inertia of a triangular section (base b, height h) about centroidal axis parallel to the base, is

bh³/2
b³h/12
bh³/3
bh³/36

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Applied Mechanics and Graphic Statics
A 2 m long ladder rests against a wall and makes an angle of 30° with the horizontal floor. Where will be the instantaneous center of rotation when the ladder starts slipping ? i. 1.0 in from the wall ii. 1.732 m from the wall iii. 1.0 m above the floor iv. 1.732 m above the floor The correct answer is

(i) and (iii)
(i) and (iv)
(ii) and (iii)
(ii) and (iv)

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Applied Mechanics and Graphic Statics
A satellite goes on moving along its orbit round the earth due to

None of these
Centrifugal force
Gravitational force
Centripetal force

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Applied Mechanics and Graphic Statics
The beam shown in below figure is supported by a hinge at ‘A’ and a roller at ‘B’. The reaction RA of the hinged support ‘A’ of the beam, is

10.6 t
10.8 t
10.2 t
10.4 t

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Applied Mechanics and Graphic Statics
The units of inertia of mass are

m⁴
kg/m
kg/m²
kg-m²

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Applied Mechanics and Graphic Statics
The condilion for a lifting machine to be reversible is that its efficiency should be

equal to 100%
more than 66.67%
more than 50%
less than 50%

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