Physics-
General
Easy

Question

A small block of mass 'm' is rigidly attached at 'P' to a ring of mass '3m' and radius 'r'. The system is released from rest at theta equals 90 to the power of ring operator end exponent and rolls without sliding. The angular acceleration of hoop just after release is

  1. fraction numerator g over denominator 4 r end fraction    
  2. fraction numerator g over denominator 8 r end fraction    
  3. fraction numerator g over denominator 3 r end fraction    
  4. fraction numerator g over denominator 2 r end fraction    

The correct answer is: fraction numerator g over denominator 8 r end fraction

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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

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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

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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

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vertex of the parabola is the point that divides the curve into two symmetric parts.

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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

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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.

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Length of the shortest normal chord of the parabola y2 = 4x is-

Length of the shortest normal chord of the parabola y2 = 4x is-

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If the tangents and normals at the extremities of a focal chord of a parabola intersect at (x1, y1) and (x2, y2) respectively, then-

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The common tangents to the circle x2 + y2 = a2/2 and the parabola y2 = 4ax intersect at the focus of the parabola-

The common tangents to the circle x2 + y2 = a2/2 and the parabola y2 = 4ax intersect at the focus of the parabola-

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If on a given base triangle b be described such that the sum of the tangents of the base angles is constant (k), then the locus of third vertex is -

If on a given base triangle b be described such that the sum of the tangents of the base angles is constant (k), then the locus of third vertex is -

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Set of values of ‘h’ for which the number of distinct common normals of (x – 2)2 = 4(y – 3) and x2 + y2 – 2x – hy – c = 0 (c > 0) is 3, is -

Set of values of ‘h’ for which the number of distinct common normals of (x – 2)2 = 4(y – 3) and x2 + y2 – 2x – hy – c = 0 (c > 0) is 3, is -

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PA and PB are the tangents drawn to y2 = 4x from point P. These tangents meet the y-axis at the points A1 and B1 respectively. If the area of triangle PA1 B1 is 2 sq. units, then locus of ‘p’ is -

PA and PB are the tangents drawn to y2 = 4x from point P. These tangents meet the y-axis at the points A1 and B1 respectively. If the area of triangle PA1 B1 is 2 sq. units, then locus of ‘p’ is -

maths-General
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If the chord of contact of tangents from a point P to the parabola y2 = 4ax, touches the parabola x2 = 4by, then the locus of P is a/an -

If the chord of contact of tangents from a point P to the parabola y2 = 4ax, touches the parabola x2 = 4by, then the locus of P is a/an -

maths-General
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AB, AC are tangents to a parabola y2 = 4ax. If l1, l2, l3 are the lengths of perpendiculars from A, B, C on any tangent to the parabola, then -

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Circle drawn having it’s diameter equal to focal distance of any point lying on the parabola x2 – 4x + 6y + 10 = 0, will touch a fixed line whose equation is -

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AB is a double ordinate of the parabola y2 = 4ax. Tangents drawn to parabola at A and B meets y-axis at A1 and B1 respectively. If the area of trapezium AA1 B1 B is equal to 12a2, then angle subtended by A1B1 at the focus of the parabola is equal to -

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The parabola y2 = 4x and the circle (x – 6)2 + y2 = r2 will have no common tangent, if ‘r’ is equal to -

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The name of the conic represented by the equation x2 + y2 – 2xy + 20x + 10 = 0 is-

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