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Applied Mechanics and Graphic Statics

Applied Mechanics and Graphic Statics
A retarding force on a body does not

None of these
Introduce the motion of the body
Retard the motion of the body
Change the motion of the body

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Applied Mechanics and Graphic Statics
If a particle moves with a uniform angular velocity ‘ω’ radians/sec along the circumference of a circle of radius ‘r’, the equation for the velocity of the particle, is

v = ω √(r² + y²)
y = ω √(y - r)
v = ω √(r² - y²)
v = ω √(y² - r²)

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Applied Mechanics and Graphic Statics
A rigid body is in a stable equilibrium if the application of any force

Can raise the CG of the body but cannot lower it
None of above
Neither raises nor lowers the CG of the body
Tends to lower the CG of the body

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Applied Mechanics and Graphic Statics
The maximum frictional force which comes into play, when a body just begins to slide over the surface of a another body, is known

Rolling friction
Sliding friction
None of these
Limiting friction

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Applied Mechanics and Graphic Statics
A train weighing 196 tonnes experiences a frictional resistance of 5(11/22) per tonne. The speed of the train at the top of a down gradient 1 in 78.4 is 36 km/hour. The speed of the train after running 1 km down the slope, is

5 √3 m/sec
10 √5 m/sec
3 √5 m/sec
5 √10 m/sec

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Applied Mechanics and Graphic Statics
The numbers of funicular polygons which can be drawn to pass through two specified points in the space diagram are

1
2
Zero
Infinity

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