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Engineering Mechanics

Engineering Mechanics
The force, by which the body is attracted, towards the center of the earth, is called

Momentum
Mass
Weight
Impulsive force

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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/2
v/4
v/8
v

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Engineering Mechanics
The C.G. of a solid hemisphere lies on the central radius 3r

At distance — from the plane base 3r
At distance — from the plane base 3r
At distance — from the plane base 3r
At distance — from the plane base

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Engineering Mechanics
Moment of inertia of a rectangular section having width (b) and depth (d) about an axis passing through its C.G. and parallel to the width (b), is

db³/36
bd³/36
bd³/12
db³/12

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Engineering Mechanics
Moment of inertia of a triangular section of base (b) and height (h) about an axis through its base, is

bh3/36
bh3/12
bh3/8
bh3/4

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Engineering Mechanics
A body of weight 'W' is required to move up on rough inclined plane whose angle of inclination with the horizontal is 'α'. The effort applied parallel to the plane is given by (where μ = tanφ = Coefficient of friction between the plane and the body.)

P = W tanα
P = W tan (α + φ)
P = W (sinα + μcosα)
P = W (cosα + μsinα)

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