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Applied Mechanics and Graphic Statics

Applied Mechanics and Graphic Statics
A particle is executing simple harmonic motion in a line 1.0 m long. If the time of one complete vibration is 1 sec, then the maximum velocity of the particle is

1.57 m/sec
6.28 m/sec
1.00 m/sec
3.14 m/sec

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Applied Mechanics and Graphic Statics
A particle is dropped from a height of 3 m on a horizontal floor, which has a coefficient of restitution with the ball of 1/2. The height to which the ball will rebound after striking the floor is

0.75 m
1.5 m
1.0 m
0.5 m

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Applied Mechanics and Graphic Statics
The condilion for a lifting machine to be reversible is that its efficiency should be

more than 66.67%
equal to 100%
less than 50%
more than 50%

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Applied Mechanics and Graphic Statics
A ladder of weight 'w' rests against a smooth vertical wall, and rests on rough horizontal ground, the coefficient of friction between the ladder and the ground being 1/4. The maximum angle of inclination of the ladder to the vertical, if a man of weight 'w' is to walk to the top of it safely, is tan'1 x, where x is

3
1/3
1/4
4

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Applied Mechanics and Graphic Statics
Engineer's units of force, is

Dyne in absolute units
All listed here
Newton in absolute units
Newton and dyne in absolute units

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Applied Mechanics and Graphic Statics
M.I. of a thin ring (external diameter D, internal diameter d) about an axis perpendicular to the plane of the ring, is

π/64 (D⁴ + d⁴)
π/32 (D⁴ - d⁴)
π/32 (D⁴ × d⁴)
π/32 (D⁴ + d⁴)

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