Strength of Materials
Which of the following is the locus of a point that moves in such a manner that its distance from a fixed point is equal to its distance from a fixed line multiplied by a constant greater than one

ellipse
circle
parabola
hyperbola

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Strength of Materials
Center of percussion is

the point of C.G.
the point of application of the resultant of all the forces tending to cause a body to rotate about a certain axis
point of suspension
the point of metacentre

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Strength of Materials
Kinetic friction is the

The friction force acting when the body is just about to move
Ratio of limiting friction and normal reaction
Tangent of angle between normal reaction and the resultant of normal reaction and the limiting friction
The friction force acting when the body is in motion

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