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Applied Mechanics and Graphic Statics

Applied Mechanics and Graphic Statics
In a simple screw jack, the pitch of the screw is 9 mm and length of the handle operating the screw is 45 cm. The velocity ratio of the system is

5
25
314
1.5

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Applied Mechanics and Graphic Statics
A weight ‘W’ is suspended at the free end of a light member hinged to a vertical wall. If the angle of inclination of the member with the upper wall is θ°, the force introduced in the member, is

W cos θ
W cosec θ
W sec θ
W sin θ

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

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

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Applied Mechanics and Graphic Statics
The resultant of two forces acting at right angles is 5 kgf and if they act at an angle of 60°, it is 37 kgf. The magnitudes of the forces are:

3 kgf, 4 kgf
2 kgf, 3 kgf
5 kgf, 3 kgf
4 kgf, 5 kgf

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Applied Mechanics and Graphic Statics
The condition of equilibrium for any system of forces in a plane is

Both (A) and (B)
That polygon of forces must close
That resultant couple must be zero
None of these

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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

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

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