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Engineering Mechanics

Engineering Mechanics
The potential energy of a vertically raised body is __________ the kinetic energy of a vertically falling body.

Less than
None of these
Equal to
Greater than

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

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

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Engineering Mechanics
If a number of forces are acting at a point, their resultant is given by

(∑V)2 + (∑H)2
(∑V)2 +(∑H)2 +2(∑V)(∑H)
√[(∑V)2 +(∑H)2 +2(∑V)(∑H)]
√[(∑V)2 + (∑H)2]

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Engineering Mechanics
Moment of inertia of a circular section about an axis perpendicular to the section is

πd4/64
πd3/32
πd4/32
πd3/16

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Engineering Mechanics
One joule is equal to

0.1 N-m
1 N-m
100 N-m
10 N-m

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Engineering Mechanics
The velocity ratio of a differential wheel and axle with 'D' as the diameter of effort wheel and d1 and d2 as the diameters of larger and smaller axles respectively, is

2D/(d₁ + d₂)
2D/(d₁ - d₂)
D/(d₁ - d₂)
D/(d₁ + d₂)

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