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Engineering Mechanics

Engineering Mechanics
Moment of inertia of a triangular section of base (b) and height (h) about an axis through its base, is

bh3/12
bh3/8
bh3/4
bh3/36

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Engineering Mechanics
The force applied on a body of mass 100 kg to produce an acceleration of 5 m/s2, is

20 N
500 N
None of these
100 N

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Engineering Mechanics
On a ladder resting on smooth ground and leaning against vertical wall, the force of friction will be

Downwards at its upper end
Away from the wall at its upper end
Upwards at its upper end
Towards the wall at its upper end

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Engineering Mechanics
The velocity ratio of a first system of pulleys with 4 pulleys is

16
20
4
8

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Engineering Mechanics
The equivalent length of a simple pendulum which gives the same frequency as compound pendulum is

h/(kG² + h²)
(kG² + h²)/h²
(kG² + h²)/h
h²/(kG² + h²)

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Engineering Mechanics
The resultant of the two forces ‘P’ and ‘Q’ is ‘R’. If ‘Q’ is doubled, the new resultant is perpendicular to ‘P’. Then

P = Q
Q = R
Q = 2R
None of the listed here

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