Q. A projectile is fired at an angle θ to the vertical. Its horizontal range will be maximum when θ is

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Q. A load of 500 kg was lifted through a distance of 13 cm. by an effort of 25 kg which moved through a distance of 650 cm. The mechanical advantage of the lifting machine is

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Q. In simple harmonic motion, acceleration of a particle is proportional to

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Q. A heavy ladder resting on a floor and against a vertical wall may not be in equilibrium, if

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Q. In a simple screw jack, the pitch of the screw is 9 mm and length of the handle operating the screw is 45 cm. The velocity ratio of the system is

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Q. To double the period of oscillation of a simple pendulum

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Q. For a particle moving with a simple harrmonic motion, the frequency is

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Q. A smooth cylinder lying on its convex surface remains

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Q. A weight W is suspended at the free end of a light member hinged to a vertical wall. If the angle of inclination of the member with the upper wall is θ°, the force introduced in the member, is

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Q. A satellite goes on moving along its orbit round the earth due to

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Q. The phenomenon of collision of two elastic bodies takes place because bodies

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Q. A retarding force on a body does not

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Q. The unit of force in C.G.S. system of units, is called

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Q. A block of weight 50 kg is placed on a horizontal plane. When a horizontal force of 18 kg is applied, the block is just on the point of motion. The angle of friction is

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Q. From a circular plate of a diameter 6 cm is cut out a circle whose diameter is equal to the radius of the plate. The C.G. of the remainder from the centre of circular plate is at a distance of

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Q. The force which produces an acceleration of 1 m/sec² in a mass of one kg, is called

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Q. If a spherical body is symmetrical about its perpendicular axes, the moment of inertia of the body about an axis passing through its centre of gravity as given by Routh's rule is obtained by dividing the product of the mass and the sum of the squares of two semi-axes by n where n is

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Q. The angle of projection for a range is equal to the distance through which the particle would have fallen in order to acquire a velocity equal to the velocity of projection, will be

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Q. A particle executes a simple harmonic motion. While passing through the mean position, the particle possesses

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Q. Varigon's theorem of moments states

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