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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.

3r/ 8
8r/3
4r/ 3π
3r/4π

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Engineering Mechanics
Two forces are acting at an angle of 120°. The bigger force is 40 N and the resultant is perpendicular to the smaller one. The smaller force is

40 N
120 N
None of the listed here
20 N

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Engineering Mechanics
The horizontal range of a projectile (R) is given by

R = u² sinα/g
R = u² cosα/g
R = u² cos2α/g
R = u² sin2α/g

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Engineering Mechanics
The acceleration of a particle moving with simple harmonic motion is __________ at the mean position.

Zero
None of these
Minimum
Maximum

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Engineering Mechanics
The range of projectile on a downward inclined plane is ________ the range on upward inclined plane for the same velocity of projection and angle of projection.

Less than
None of These
More than
Equal to

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Engineering Mechanics
The maximum height of a projectile on a horizontal plane, is

u² sin²α/g
u² cos²α/2g
u² cos²α/g
u² sin²α/2g

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