Question
The figure shows a uniform rod lying along the x-axis. The locus of all the points lying on the xy-plane, about which the moment of inertia of the rod is same as that about O is :
- an ellipse
- a circle
- a parabola
- a straight line
The correct answer is: a circle
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x – 2 = t2, y = 2t are the parametric equations of the parabola
parametric form gives us the general coordinates of the curve. we can solve for the two to build the relationship between the x and y coordinates which gives us the locus
x – 2 = t2, y = 2t are the parametric equations of the parabola
parametric form gives us the general coordinates of the curve. we can solve for the two to build the relationship between the x and y coordinates which gives us the locus
Vertex of the parabola y2 + 2y + x = 0 lies in the quadrant
vertex of the parabola is the point that divides the curve into two symmetric parts.
Vertex of the parabola y2 + 2y + x = 0 lies in the quadrant
vertex of the parabola is the point that divides the curve into two symmetric parts.
The equation of the parabola with focus (3, 0) and the directrix x + 3 = 0 is
the locus of all points which are equidistant from a point called focus and a aline called directrix is known as a parabola. as per this definition, we can solve the given question.
The equation of the parabola with focus (3, 0) and the directrix x + 3 = 0 is
the locus of all points which are equidistant from a point called focus and a aline called directrix is known as a parabola. as per this definition, we can solve the given question.