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Engineering Mechanics

Engineering Mechanics
Moment of inertia of a circular section about its diameter (d) is

πd3/16
πd4/64
πd3/32
πd4/32

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Engineering Mechanics
Two balls of equal mass and of perfectly elastic material are lying on the floor. One of the balls with velocity ‘v’ is made to strike the second ball. Both the balls after impact will move with a velocity

v/8
v
v/2
v/4

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Engineering Mechanics
The overturning of a vehicle on a level circular path can be avoided if the velocity of vehicle is __________ √(gra/h)

Greater than
None of these
Equal to
Less than

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Engineering Mechanics
Three forces acting on a rigid body are represented in magnitude, direction and line of action by the three sides of a triangle taken in order. The forces are equivalent to a couple whose moment is equal to

None of these
Half the area of the triangle
Twice the area of the triangle
Area of the triangle

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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

Iω
0.5 Iω
Iω2
0.5 Iω2

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Engineering Mechanics
If rain is falling in the opposite direction of the movement of a pedestrian, he has to hold his umbrella

More inclined when moving
More inclined when standing
Less inclined when moving
Less inclined when standing

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