Q. An ideal machine is one whose efficiency is

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Q. The energy possessed by a body, for doing work by virtue of its position, is called

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Q. The potential energy stored by a spring in compression, is called strain energy.

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Q. The moment of a force

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Q. The frequency of oscillation of a compound pendulum is(where kG = Radius of gyration about the centroidal axis, and h = Distance between the point of suspension and C.G. of the body.)

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Q. In a single threaded worm and worm wheel, the number of teeth on the worm is 50. The diameter of the effort wheel is 100 mm and that of load drum is 50 mm. The velocity ratio is

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Q. The total motion possessed by a body, is called

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Q. The matter contained in a body, is called

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Q. The centre of percussion is below the centre of gravity of the body and is at a distance equal to

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Q. If a number of coplaner forces acting at a point be in equilibrium, the sum of clockwise moments must be __________ the sum of anticlockwise moments, about any point.

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Q. The forces, which do not meet at one point, but their lines of action lie on the same plane, are known as coplaner non-concurrent forces.

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Q. If three forces acting at a point be represented in magnitude and direction by the three sides of a triangle, taken in order, the forces shall be in equilibrium.

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Q. Moment of inertia is the

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Q. The coefficient of restitution for inelastic bodies is

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Q. When the lift is moving upwards with some acceleration, the pressure exerted by a man is __________ proportional to its acceleration.

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Q. The term 'centroid' is

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Q. Two forces are acting at an angle of 120°. The bigger force is 40N and the resultant is perpendicular to the smaller one. The smaller force is

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Q. The centre of gravity a T-section 100 mm x 150 mm x 50 mm from its bottom is

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Q. In order to completely specify angular displacement by a vector, it must fix

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Q. Which of the following statement is correct in connection with projectiles?

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