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Engineering Mechanics

Engineering Mechanics
The time of flight (t) of a projectile on a horizontal plane is given by

t = 2u/g.sinα
t = 2u. cosα/g
t = 2u. sinα/g
t = 2u. tanα/g

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Engineering Mechanics
The wheels of a moving car possess

Kinetic energy of translation only
Potential energy only
Kinetic energy of translation and rotation both
Kinetic energy of rotation only

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Engineering Mechanics
A smooth cylinder lying on a __________ is in neutral equilibrium.

None of these
Curved surface
Convex surface
Horizontal surface

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Engineering Mechanics
The equivalent length of a simple pendulum which gives the same frequency as compound pendulum is

(kG² + h²)/h²
h²/(kG² + h²)
h/(kG² + h²)
(kG² + h²)/h

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Engineering Mechanics
The algebraic sum of moments of the forces forming couple about any point in their plane is

Both of above are wrong
Constant
Both of above are correct
Equal to the moment of the couple

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Engineering Mechanics
The range of projectile will be maximum for a given velocity of projectile, when the angle of projection (α) is

45° + β/2
30° + β/2
β/2
60° + β/2

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