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Engineering Mechanics

Engineering Mechanics
The motion of a particle round a fixed axis is

Circular
Rotary
Translatory as well as rotary
Translatory

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Engineering Mechanics
If ‘P’ is the force acting on the body, ‘m’ is the mass of the body and ‘a’ is the acceleration of the body, then according to Newton's second law of motion,

P × m.a = 0
P + m.a = 0
P - m.a = 0
P/m.a = 0

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Engineering Mechanics
A rubber ball is dropped from a height of 2 m. If there is no loss of velocity after rebounding, the ball will rise to a height of

4 m
3 m
2 m
1 m

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Engineering Mechanics
The friction experienced by a body, when at rest, is known as

Dynamic friction
Coefficient of friction
Static friction
Limiting friction

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Engineering Mechanics
In a screw jack, the effort required to lift the load is given by (where W = Load lifted, α = Helix angle, and φ = Angle of friction.)

P = W tan (α - φ)
P = W tan (α + φ)
P = W cos (α + φ)
P = W tan (φ - α)

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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

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

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