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Engineering Mechanics

Engineering Mechanics
The process of finding out the resultant force is called __________ of forces.

None of these
Resolution
Decomposition
Composition

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Engineering Mechanics
The centre of gravity a T-section 100 mm × 150 mm × 50 mm from its bottom is

125 mm
50 mm
75 mm
87.5 mm

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Engineering Mechanics
The moment of inertia of a rectangular section 3 cm wide and 4 cm deep about X-X axis is

9 cm4
16 cm4
20 cm4
12 cm4

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Engineering Mechanics
The acceleration of a body sliding down an inclined surface is

g cosθ
g tanθ
g sinθ
None of these

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Engineering Mechanics
The maximum efficiency of a screw jack is

(1 + tanφ)/(1 - tanφ)
(1 - tanφ)/(1 + tanφ)
(1 + sinφ)/(1 - sinφ)
(1 - sinφ)/(1 + sinφ)

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Engineering Mechanics
If the body falls freely under gravity, then the gravitational acceleration is taken as

+8.9 m/s2
-8.9 m/s2
+9.8 m/s2
-9.8 m/s2

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