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Applied Mechanics and Graphic Statics

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

80
50
30
60

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Applied Mechanics and Graphic Statics
The torque produced by a force depends on i. the magnitude of the force ii. the direction of the force iii. the point of application of the force relative to origin The correct answer is

all (i), (ii) and (iii)
only (i)
both (i) and (iii)
both (i) and (ii)

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Applied Mechanics and Graphic Statics
The centre of gravity of a trapezoidal dam section whose top width is a, bottom width is band the vertical side is a, from its vertical face is

(a² + ab + b²)/3 (a + b)
(a² + ab + c²)/3 (a + c)
None of these
(b² + bc + c²)/3 (b + c)

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Applied Mechanics and Graphic Statics
The maximum velocity of a body vibrating with a simple harmonic motion of amplitude 150 mm and frequency 2 vibrations/sec, is

0.18845 m/sec
18.85 m/sec
188.5 m/sec
1.885 m/sec

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Applied Mechanics and Graphic Statics
The displacement of a particle which moves along a straight line is given by S = 4t³ + 3t²- 10 where ‘S’ is in meters and t is in seconds. The time taken by the particle to acquire a velocity of 18 m/sec from rest, is

1.2 sec
½ sec
1.5 sec
1 sec

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Applied Mechanics and Graphic Statics
Which of the following is a scalar quantity?

Torque
Momentum
Impulse
Energy

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