Civil Engineering :: Applied Mechanics
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The centre of gravity of a homogenous body is the point at which the whole
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Pick up the correct statement from the following
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Centre of gravity of a thin hollow cone lies on the axis of symmmetry at a height of
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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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Periodic time of a particle moving with simple harmonic motion is the time taken by the particle for
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The reaction at the central support B of the beam ABC hinged at D shown in below figure is
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The displacement of a particle which moves along a straight line is given by S = 4t3 + 3t2 - 10 where S is in meters and t is in seconds. The time taken by the particle to acquire a velocity of 18 m/sec from rest, is
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If the resultant of two forces P and Q acting at an angle θ makes an angle α with P, then tan α equals
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Pick up the correct statement from the following. The kinetic energy of a body
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A.
If two equal and perfectly elastic smooth spheres impinge directly, they interchange their velocities. |
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B.
If a sphere impinges directly on an equal sphere which is at rest, then a fraction \(\frac { 1 } { 2 }\)(1 - e2) the original kinetic energy is lost by the impact. |
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C.
If a smooth sphere impinges on another sphere, which is at rest, the latter will move along the line of centres. |
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D.
If two equal spheres which are perfectly elastic impinge at right angles, their direction after impact will still be at right angles. |
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E.
All the above. |