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Engineering Mechanics

Engineering Mechanics
The center of gravity of a semi-circle lies at a distance of __________ from its base measured along the vertical radius.

4r/ 3π
8r/3
3r/ 8
3r/4π

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Engineering Mechanics
In a single threaded worm and worm wheel, the number of teeth on the worm is 50. The diameter of the effort wheel is 100 mm and that of load drum is 50 mm. The velocity ratio is

400
50
100
200

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Engineering Mechanics
The moment of inertia of a square of side a about its diagonal is

a⁴/16
a⁴/12
a³/12
a²/8

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Engineering Mechanics
The energy possessed by a body, for doing work by virtue of its position, is called

Potential energy
Chemical energy
Kinetic energy
Electrical energy

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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.)

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

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Engineering Mechanics
The periodic time (T) is given by (where, ω = Angular velocity of particle in rad/s.)

π/ω
2π × ω
2π/ω
ω/2π

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