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Applied Mechanics and Graphic Statics

Applied Mechanics and Graphic Statics
The resultant of two forces acting at right angles is 5 kgf and if they act at an angle of 60°, it is 37 kgf. The magnitudes of the forces are:

5 kgf, 3 kgf
2 kgf, 3 kgf
4 kgf, 5 kgf
3 kgf, 4 kgf

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Applied Mechanics and Graphic Statics
A ball of mass 250 g moving on a smooth horizontal table with a velocity of 10 m/sec hits an identical stationary ball ‘B’ on the table. If the impact is perfectly plastic, the velocity of the ball ‘B’ just after impact would be

5 m/sec
10 m/sec
None of these
Zero

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

Newton
Dyne
Kg
All of these

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Applied Mechanics and Graphic Statics
A heavy ladder resting on a floor and against a vertical wall may not be in equilibrium, if

Floor and wall both are rough surfaces
Floor and wall both are smooth surfaces
Floor is smooth and the wall is rough
Floor is rough and the wall is smooth

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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?

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

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Applied Mechanics and Graphic Statics
The resultant of two forces ‘P’ and ‘Q’ acting at an angle ‘θ’, is

P² + Q² + 2PQ tan θ
P² + Q² + 2P sin θ
P² + Q² + 2PQ cos θ
√(P² + Q² + 2PQ cos θ)

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