Civil Engineering :: Applied Mechanics
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Lami's theroem states that
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Pick up the incorrect statement from the following. In case of suspension bridge due to rise in temperature,
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If two forces acting at a point are in equilibrium, they must be equal in magnitude and their line of action must be along
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For lifting a load of 50 kg through a distance of 2.5 cm, an effort of 12.5 kg is moved through a distance of 40 cm. The efficiency of the lifting machine, is
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The ends of a string weighing w/metre are attached to two points at the same horizontal level. If the central dip is very small, the horizontal tension of the string throughout is
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If two forces P and Q (P greater than Q) act on the same straight line but in opposite direction, their resultant, is
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If the angle between the applied force and the direction of motion of a body, is between 90° and 180°, the work done, is called
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To avoid bending action at the base of a pier,
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A.
three forces acting at a point are always in equilibrium |
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B.
if three forces acting on a point can be represented in magnitude and direction by the sides of a triangle, the point will be in the state of equilibrium |
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C.
three coplaner forces acting at a point will be in equilibrium, if each force is proportional to the sine of the angle between the other two |
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D.
three coplaner forces acting at a point will be in equilibrium if each force is inversely proportional to the sine of the angle between the other two |
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E.
none of these. |
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