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Engineering Mechanics

Engineering Mechanics
The center of gravity of a quadrant of a circle lies along its central radius (r) at a distance of

0.7 r
0.6 r
0.8 r
0.5 r

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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.)

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

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Engineering Mechanics
Moment of inertia of a circular section about its diameter (d) is

πd4/32
πd4/64
πd3/32
πd3/16

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Engineering Mechanics
The coefficient of restitution for inelastic bodies is

One
Between zero and one
More than one
Zero

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Engineering Mechanics
Whenever a force acts on a body and the body undergoes a displacement, then

Body has kinetic energy of translation
Power is being transmitted
Work is said to be done
None of these

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Engineering Mechanics
A weight of 1000 N can be lifted by an effort of 80 N. If the velocity ratio is 20, the machine is

Non-reversible
None of these
Reversible
Ideal

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