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Applied Mechanics and Graphic Statics

Applied Mechanics and Graphic Statics
A projectile has maximum range of 40 m on a horizontal plane. If angle of projection is a and the time of flight is 1 second, then sin a must be about (Assume g = 10 m/sec²)

43833
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43834

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Applied Mechanics and Graphic Statics
The locus of the instantaneous centre of a moving rigid body, is

Straight line
Involute
Spiral
Centroid

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Applied Mechanics and Graphic Statics
A load of 500 kg was lifted through a distance of 13 cm. by an effort of 25 kg which moved through a distance of 650 cm. The mechanical advantage of the lifting machine is

15
26
20
18

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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
A ball moving on a smooth horizontal table hits a rough vertical wall, the coefficient of restitution between ball and wall being 1/3. The ball rebounds at the same angle. The fraction of its kinetic energy lost is

43864
44052
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Applied Mechanics and Graphic Statics
If the given forces P₁, P₂, P₃ and P₄ are such that the force polygon does not close, then the system will

Always reduce to a couple
Both (A) and (C)
Be in equilibrium
Always reduce to a resultant force

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