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Applied Mechanics and Graphic Statics

Applied Mechanics and Graphic Statics
The velocity of a moving body, is

A constant quantity
A scalar quantity
None of these
A vector quantity

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Applied Mechanics and Graphic Statics
A rod 5 m in length is moving in a vertical plane. When it is inclined at 60° to horizontal, its lower end is moving horizontally at 3 m/sec and upper end is moving in vertical direction. The velocity of its upper end, is

1.5 m/sec
1.0 m/sec
2.5 m/sec
0.5 m/sec

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

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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

314
5
25
1.5

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Applied Mechanics and Graphic Statics
M.I. of a thin ring (external diameter D, internal diameter d) about an axis perpendicular to the plane of the ring, is

π/32 (D⁴ + d⁴)
π/64 (D⁴ + d⁴)
π/32 (D⁴ × d⁴)
π/32 (D⁴ - d⁴)

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Applied Mechanics and Graphic Statics
If the resultant of two forces has the same magnitude as either of the force, then the angle between the two forces is

45°
120°
30°
60°

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