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Engineering Mechanics

Engineering Mechanics
The total motion possessed by a body, is called

Momentum
Mass
Impulsive force
Weight

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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
v/8
v/4

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Engineering Mechanics
The ratio of limiting friction and normal reaction is known as

Angle of friction
Angle of repose
Coefficient of friction
Sliding friction

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Engineering Mechanics
The resultant of the two forces ‘P’ and ‘Q’ is ‘R’. If ‘Q’ is doubled, the new resultant is perpendicular to ‘P’. Then

P = Q
None of the listed here
Q = 2R
Q = R

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Engineering Mechanics
The velocity ratio for the first system of pulleys is (where n is the number of pulleys.)

2n
2n - 1
n
n²

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

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