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Engineering Mechanics

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

20 cm4
16 cm4
12 cm4
9 cm4

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Engineering Mechanics
The time of flight (t) of a projectile on a horizontal plane is given by

t = 2u/g.sinα
t = 2u. sinα/g
t = 2u. cosα/g
t = 2u. tanα/g

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Engineering Mechanics
A cable with a uniformly distributed load per horizontal meter run will take the following shape

Straight line
Elliptical
Parabola
Hyperbola

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Engineering Mechanics
If a body is acted upon by a number of coplanar non-concurrent forces, it may

Rotate about itself without moving
Be completely at rest
All of these
Move in any one direction rotating about itself

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Engineering Mechanics
The unit of moment of inertia of an area is

kg/m2
kg-m-s2
kg-m2
m4

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Engineering Mechanics
If tension in the cable supporting a lift moving downwards is half the tension when it is moving upwards, the acceleration of the lift is

g/4
g/2
None of these
g/3

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