Q. When a body falls freely under gravitational force, it possesses __________ weight.

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Q. A lead ball with a certain velocity is made to strike a wall, it falls down, but rubber ball of same mass and with same velocity strikes the same wall, it rebounds. Select the correct reason from the following:

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Q. If P is the force acting on the body, m is the mass of the body and a is the acceleration of the body, then according to Newton's second law of motion,

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Q. If the resultant of a number of forces acting on a body is zero, then the body will not be in equilibrium.

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Q. The friction experienced by a body, when at rest, is known as

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Q. The moment of inertia of a solid sphere of mass m and radius r is

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Q. The centre of gravity of a quadrant of a circle lies along its central radius (r) at a distance of

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Q. The horizontal range of a projectile (R) is given by

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Q. Which of the following are vector quantities?

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Q. The maximum mechanical advantage of a lifting machine is

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Q. A machine having an efficiency greater than 50%, is known as

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Q. The impact between two lead spheres is approximately equal to an __________ impact.

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Q. Moment of inertia of a triangular section of base (b) and height (h) about an axis passing through its vertex and parallel to the base, is __________ than that passing through its C.G. and parallel to the base.

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Q. If a body is thrown upwards, then the gravitational acceleration is taken as zero.

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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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