Civil Engineering :: Applied Mechanics and Graphic Statics
- If two forces P and Q (P > Q) act on the same straight line but in opposite direction, their resultant, is
- At a given instant ship ‘A’ is travelling at 6 km/h due east and ship ‘B’ is travelling at 8 km/h due north. The velocity of ‘B’ relative to ‘A’ is
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The torque produced by a force depends on
(i) The magnitude of the force
(ii) The direction of the force
(iii) The point of application of the force relative to origin - If the kinetic energy and potential energy of a simple harmonic oscillator of amplitude A are both equal to half the total energy, then the displacement is equal to
- Lami's theorem states that
- The maximum frictional force which comes into play, when a body just begins to slide over the surface of a another body, is known
- A ball moving with a velocity of 5 m/sec impinges a fixed plane at an angle of 45° and its direction after impact is equally inclined to the line of impact. If the coefficient of restitution is 0.5, the velocity of the ball after impact will be
- 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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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 coplanar 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 coplanar 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 |