Q. A body of weight 14 g appears to weight 13 g when weighed by a spring balance in a moving lift. The acceleration of the lift at that moment was

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Q. The rate of change of displacement of a body with respect to its surrounding, is known

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Q. The Centre of gravity of a 10 x 15 x 5 cm T section from its bottom, is

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Q. For a self-locking machine, the efficiency should be

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Q. When a body moves round a fixed axis, it has

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Q. Pick up the incorrect statement from the following. In a simple harmonic motion

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Q. The gravitational force makes a satellite go round the earth in a circular orbit, if it is projected with an initial velocity of

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Q. The point about which combined motion of rotation and translation of a rigid body takes place, is known as

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Q. A particle is dropped from the top of a tower 60 m high and another is projected upwards from the foot of the tower to meet the first particle at a height of 15.9 m. The velocity of projection of the second particle is

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Q. A point subjected to a number of forces will be in equilibrium, if

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Q. M.I. of solid sphere, is

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Q. The centre of gravity of a homogenous body is the point at which the whole

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Q. Pick up the correct statement from the following :

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Q. Centre of gravity of a thin hollow cone lies on the axis of symmmetry at a height of

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Q. A ball of mass 1 kg moving with a velocity of 2 m/sec collides a stationary ball of mass 2 kg and comes to rest after impact. The velocity of the second ball after impact will be

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Q. Periodic time of a particle moving with simple harmonic motion is the time taken by the particle for

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