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Engineering Mechanics

Engineering Mechanics
If the resultant of two equal forces has the same magnitude as either of the forces, then the angle between the two forces is

30°
60°
90°
120°

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Engineering Mechanics
The mechanical advantage of a lifting machine is the ratio of

All of these
Distance moved by effort to the distance moved by load
Load lifted to the effort applied
Output to the input

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Engineering Mechanics
The centre of gravity of an isosceles triangle with base (p) and sides (q) from its base is

(p² - q²)/4
(4p² - q²)/6
[√(4p² - q²)]/6
(p² + q²)/4

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Engineering Mechanics
A block of mass 20 kg lying on a rough horizontal plane is connected by a light string passing over a smooth pulley to another mass 5 kg, which can move freely in the Vertical direction, as shown in the below figure. The tension in the string will ___________ with the increase in coefficient of friction.

Increase
None of these
Not be effected
Decrease

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Engineering Mechanics
A spherical body is symmetrical about its perpendicular axis. According to Routh's rule, the moment of inertia of a body about an axis passing through its centre of gravity is (where, M = Mass of the body, and S = Sum of the squares of the two semi-axes.)

MS/3
MS/5
None of these
MS/4

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Engineering Mechanics
The moment of inertia of a thin spherical shell of mass m and radius r, about its diameter is

2mr²/5
mr²/3
3mr²/5
2mr²/3

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MORE MCQ ON Engineering Mechanics

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