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Engineering Mechanics

Engineering Mechanics
When a body of mass 'm' attains a velocity 'v' from rest in time 't', then the kinetic energy of translation is

0.5 mv2
0.5 mgv2
mv2
mgv2

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

43832
43892
43865
43864

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Engineering Mechanics
The velocity ratio of a single purchase crab winch can be increased by

All of these
Increasing the length of the handle
Increasing the number of teeth of the pinion
Increasing the radius of the load drum

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Engineering Mechanics
The centre of percussion is below the centre of gravity of the body and is at a distance equal to

h2/kG
h × kG
kG2/h
h/kG

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

4r/ 3π
3r/ 8
3r/4π
8r/3

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