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Engineering Mechanics

Engineering Mechanics
Static friction is always __________ dynamic friction.

Greater than
None of these
Equal to
Less than

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Engineering Mechanics
The centre of percussion of the homogeneous rod of length ‘L’ suspended at the top will be

L/2
2L/3
3L/4
L/3

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Engineering Mechanics
Coefficient of friction depends upon

Both (A) and (B)
Area of contact only
None of these
Nature of surface only

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Engineering Mechanics
If the number of pulleys in a system is equal to its velocity ratio, then it is a __________ system of pulleys.

First
None of these
Third
Second

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Engineering Mechanics
When a body of mass moment of inertia 'I' (about a given axis) is rotated about that axis with an angular velocity to, then the kinetic energy of rotation is

0.5 Iω
0.5 Iω2
Iω2
Iω

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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.)

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

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