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Engineering Mechanics

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

87.5 mm
50 mm
75 mm
125 mm

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Engineering Mechanics
Which of the following is an equation of linear motion?(where, u and v = Initial and final velocity of the body, a = Acceleration of the body, and s = Displacement of the body in time t seconds.)

s = u.t + ½ a.t2
All of these
v = u + a.t
v2 = u2 + 2a.s

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

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Engineering Mechanics
The velocity of a body on reaching the ground from a height h, is

√(gh)
2.√(gh)
√(2gh)
2g.√h

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

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

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Engineering Mechanics
A smooth cylinder lying on its convex surface remains in __________ equilibrium.

Unstable
Neutral
Stable
None of these

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