Q. Pick up the correct statement from the following. A rubber ball when strikes a wall rebounds but a lead ball of same mass and velocity when strikes the same wall, falls down

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Q. The instantaneous centre of a member lies at the point of intersection of two lines drawn at the ends of the member such that the lines are inclined to the direction of motion of the ends at

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Q. A rod 5 m in length is moving in a vertical plane. When it is inclined at 60° to horizontal, its lower end is moving horizontally at √3 m/sec and upper end is moving in vertical direction. The velocity of its upper end, is

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Q. The units of inertia of mass, are

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Q. A sphere is resting on two planes BA and BC which are inclined at 45° and 60° respectively with the horizontal. The reaction on the plane BA will be

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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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