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Applied Mechanics and Graphic Statics

Applied Mechanics and Graphic Statics
The point about which combined motion of rotation and translation of a rigid body takes place, is known as

Virtual centre
Instantaneous centre
Instantaneous axis
Point of rotation

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

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Applied Mechanics and Graphic Statics
If the angular distance, 0 = 2t³ ‑ 3t², the angular acceleration at t = 1 sec. is

1 rad/sec²
6 rad/sec²
12 rad/sec²
4 rad/sec²

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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
1 sec
1.5 sec
½ sec

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Applied Mechanics and Graphic Statics
The maximum value of the horizontal range for a projectile projected with a velocity of 98 m/sec is

98 m
1960 m
490 m
980 m

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Applied Mechanics and Graphic Statics
If a body is lying on a plane whose inclination with the horizontal is less than the angle of friction, then i. a force is required to move the body upwards ii. a force is required to move the body downward iii. the body will not be in equilibrium The correct answer is

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

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