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Engineering Mechanics

Engineering Mechanics
If the resultant of two equal forces has the same magnitude as either of the forces, then the angle between the two forces is

30°
60°
90°
120°

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Engineering Mechanics
The wheels of a moving car possess

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

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

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

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Engineering Mechanics
The force required to move the body up the plane will be minimum if it makes an angle with the inclined plane __________ the angle of friction.

Greater than
Less than
None of these
Equal to

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Engineering Mechanics
If a suspended body is struck at the center of percussion, then the pressure on die axis passing through the point of suspension will be

Zero
Infinity
Maximum
Minimum

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Engineering Mechanics
According to parallel axis theorem, the moment of inertia of a section about an axis parallel to the axis through center of gravity (i.e. IP) is given by(where, A = Area of the section, IG = Moment of inertia of the section about an axis passing through its C.G., and h = Distance between C.G. and the parallel axis.)

IP = IG - Ah2
IP = IG / Ah2
IP = IG + Ah2
IP = Ah2 / IG

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