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Applied Mechanics and Graphic Statics

Applied Mechanics and Graphic Statics
A block in the shape of a parallelepiped of sides 1m × 2m × 3m lies on the surface. Which of the faces gives maximum stable block?

1 m × 2 m
Equally stable on all faces
1 m × 3 m
2 m × 3 m

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Applied Mechanics and Graphic Statics
The unit of force in C.G.S. system of units, is called

All of these
Dyne
Newton
Kg

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Applied Mechanics and Graphic Statics
In a lifting machine with efficiency 60%, an effort of 200 N is required to raise a load of 6 kN. The velocity ratio of the machine is

50
80
30
60

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Applied Mechanics and Graphic Statics
The moment of inertia of a hollow circular section whose external diameter is 8 cm and internal diameter is 6 cm, about centroidal axis, is

337.5 cm⁴
237.5 cm⁴
437.5 cm⁴
137.5 cm⁴

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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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Applied Mechanics and Graphic Statics
A ball moving with a velocity of 5 m/sec impinges a fixed plane at an angle of 45° and its direction after impact is equally inclined to the line of impact. If the coefficient of restitution is 0.5, the velocity of the ball after impact will be

2.5 m/sec
1.5 m/sec
0.5 m/sec
3.5 m/sec

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