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Applied Mechanics and Graphic Statics

Applied Mechanics and Graphic Statics
If two forces are in equilibrium, then the forces must (i) Be equal in magnitude (ii) Be opposite in sense (iii) Act along the same line

Only (i)
(i) and (iii)
All (i), (ii) and (iii)
(i) and (ii)

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Applied Mechanics and Graphic Statics
The ratio of unit of force in gravitational system to that in absolute system is (where ‘g’ is acceleration due to gravity)

None of these
1/g
g
1

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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

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

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Applied Mechanics and Graphic Statics
In SI units, the units of force and energy are respectively

kg wt and joule
Dyne and erg
Newton and joule
Newton and watt

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Applied Mechanics and Graphic Statics
A uniform rod 9 m long weighing 40 kg is pivoted at a point 2 m from one end where a weight of 120 kg is suspended. The required force acting at the end in a direction perpendicular to rod to keep it equilibrium, at an inclination 60° with horizontal, is

10 kg
40 kg
60 kg
100 kg

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Applied Mechanics and Graphic Statics
If the velocity of projection is 4 m/sec and the angle of projection is α°, the maximum height of the projectile from a horizontal plane, is

u² tan² α/2g
u² sin² α/2g
u² cos² α/2g
u² sin 2α/2g

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