Q. The radius of gyration is the distance where the whole mass (or area) of a body is assumed to be concentrated.

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Q. If three coplaner forces acting on a point are in equilibrium, then each force is proportional to the sine, of the angle between the other two.

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Q. A rubber ball is dropped from a height of 2 m. If there is no loss of velocity after rebounding, the ball will rise to a height of

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Q. When the spring of a watch is wound, it will possess

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Q. For a self locking machine, the efficiency must be

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Q. The resultant of the two forces P and Q is R. If Q is doubled, the new resultant is perpendicular to P. Then

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Q. For a self locking machine, the efficiency must be

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Q. Whenever a force acts on a body and the body undergoes a displacement, then

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Q. When a particle moves along a straight path, there will be centripetal acceleration as well as tangential acceleration.

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Q. The acceleration of a particle moving with simple harmonic motion is __________ at themean position.

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Q. The velocity of a particle moving with simple harmonic motion is __________ at the mean position.

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Q. A framed structure is imperfect, if the number of members are __________ (2j - 3).

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Q. The linear acceleration (a) of a body rotating along a circular path of radius (r) with an angular acceleration of α rad / s², is

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Q. The total energy possessed by a system of moving bodies

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Q. The polygon law of forces states that if a number of forces, acting simultaneously on a particle, be represented in magnitude and direction by the sides a polygon taken in order, then their resultant is represented in magnitude and direction by the closing side of the polygon, taken in opposite direction.

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Q. A smooth cylinder lying on a __________ is in neutral equilibrium.

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Q. The velocity of a particle (v) moving with simple harmonic motion, at any instant is given by(where r = Amplitude of motion, and y = Displacement of the particle from mean position.)

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Q. Varingon's theorem of moments states that if a number of coplaner forces acting on a particle are in equilibrium, then

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Q. The loss of kinetic energy during inelastic impact, is given by(where m1 = Mass of the first body,m2 = Mass of the second body, and u1 and u2 = Velocities of the first and second bodies respectively.)

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Q. The centre of gravity of a hemisphere lies at a distance of 3r / 8 from its base measured along the vertical radius.

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