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Engineering Mechanics

Engineering Mechanics
The range of a projectile is maximum, when the angle of projection is

60°
45°
90°
30°

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Engineering Mechanics
The forces which do not meet at one point and their lines of action do not lie on the same plane are known as

None of these
Non-coplanar concurrent forces
Coplanar concurrent forces
Coplanar non-concurrent forces

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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 = Ah2 / IG
IP = IG - Ah2

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Engineering Mechanics
The time of flight (t) of a projectile on an upward inclined plane is(where u = Velocity of projection, α = Angle of projection, and β = Inclination of the plane with the horizontal.)

t = 2u sin (α + β)/g cos β
t = g cos β/2u sin (α + β)
t = 2u sin (α - β)/g cos β
t = g cos β/2u sin (α - β)

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Engineering Mechanics
If u₁ and u₂ are the velocities of two moving bodies in the same direction before impact and v₁ and v₂ are their velocities after impact, then coefficient of restitution is given by

(u₁ - u₂)/(v₁ - v₂)
(v₂ - v₁)/(u₁ - u₂)
(v₁ - v₂)/(u₁ - u₂)
(u₂ + u₁)/(v₂ + v₁)

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Engineering Mechanics
Which of the following are vector quantities?

Linear velocity
All of these
Linear displacement
Linear acceleration

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MORE MCQ ON Engineering Mechanics

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