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Engineering Mechanics

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

g cosθ
None of these
g sinθ
g tanθ

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Engineering Mechanics
If n = number of members and y = number of joints, then for a perfect frame, n = ?

43892
43865
43864
43832

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Engineering Mechanics
Moment of inertia of a rectangular section having width (b) and depth (d) about an axis passing through its C.G. and parallel to the width (b), is

bd³/36
db³/36
bd³/12
db³/12

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Engineering Mechanics
In a screw jack, the effort required to lower the load is __________ the effort required to raise the same load.

Less than
Equal to
More than
None of these

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

None of these
Equal to
Greater than
Less than

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Engineering Mechanics
If ‘P’ is the force acting on the body, ‘m’ is the mass of the body and ‘a’ is the acceleration of the body, then according to Newton's second law of motion,

P - m.a = 0
P × m.a = 0
P/m.a = 0
P + m.a = 0

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