Q. The velocity ratio of a simple wheel and axle with D and d as the diameters of effort wheel and load axle, is

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Q. The unit of force in S.I. system of units is

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Q. The moment of inertia of a solid cone of mass m and base radius r about its vertical axis is

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Q. A body is said to move or vibrate with simple harmonic motion if its acceleration is directed towards the mean position.

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Q. A ladder is resting on a rough ground and leaning against a smooth vertical wall. The force of friction will act

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Q. A ladder is resting on a smooth ground and leaning against a rough vertical wall. The force of friction will act

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Q. The length of a second's pendulum is

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Q. The slope on the road surface generally provided on the curves is known as

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Q. Coplaner non-concurrent forces are those forces which __________ at one point, but their lines of action lie on the same plane.

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Q. The moment of inertia of a rectangular section 3cm wide and 4cm deep about X-X axis is

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Q. The moment of inertia of a thin rod of mass m and length l,about an axis through its centre of gravity and perpendicular to its length is

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Q. When a body of mass m attains a velocity v from rest in time t, then the kinetic energy of translation is

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Q. The unit of angular velocity is

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Q. If a number of forces are acting at a point, their resultant is given by

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Q. A force acting in the opposite direction to the motion of the body is called force of friction.

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Q. Joule is the unit of

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Q. A spherical body is symmetrical about its perpendicular axis. According to Routh's rule, the moment of inertia of a body about an axis passing through its centre of gravity is(where, M = Mass of the body, and S = Sum of the squares of the two semi-axes.)

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Q. The three forces of 100 N, 200 N and 300 N have their lines of action parallel to each other but act in the opposite directions. These forces are known as

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Q. The efficiency of a lifting machine is the ratio of

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Q. If the efficiency of a lifting machine is kept constant, its velocity ratio is __________ propotional to its mechanical advantage.

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