Physics-
General
Easy
Question
A uniform rod of mass m, length l is placed over a smooth horizontal surface along y-axis and is at rest as shown in figure. An impulsive force F is applied for a small time 
along at point A. The x-coordinate of end A of the rod when the rod becomes parallel to x-axis for the first time is (initially the coordinate of centre of mass of the rod is (0,0)) :
The correct answer is:
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Moment of inertia of a triangle plane of mass M shown in the figure, about vertical axis AB is:
Moment of inertia of a triangle plane of mass M shown in the figure, about vertical axis AB is:
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The radius of gyration of solid hemisphere of mass M and radius R about an axis parallel to the diameter at a distance 3/4R from this plane is given by ( centre of mass of the hemisphere of the hemisphere lies at a height 3R/8 from the base)
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A square plate of mass M and edge L is shown in fig. The moment of inertia of the plate about the axis in the plane of plate and passing through one of its vertex making an angle 15° from horizontal is
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A circular plate of radius 1/2R is cut from one edge of a thin circular plate of radius R. The moment of inertia of the remaining portion about an axis through O perpendicular to plane of the plate (i.e about the 
axis 
is ( M= mass of remaining circular plate. )
A circular plate of radius 1/2R is cut from one edge of a thin circular plate of radius R. The moment of inertia of the remaining portion about an axis through O perpendicular to plane of the plate (i.e about the axis is ( M= mass of remaining circular plate. )
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A symmetrical lamina of mass M consists of a square shape with a semicircular section over each of the edge of the square as shown. The moment of inertia of the lamina about an axis through the centre of mass and perpendicular to the plane is 
. The moment of inertia about the tangent 
in the plane of the lamina is
A symmetrical lamina of mass M consists of a square shape with a semicircular section over each of the edge of the square as shown. The moment of inertia of the lamina about an axis through the centre of mass and perpendicular to the plane is . The moment of inertia about the tangent in the plane of the lamina is
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A uniform disc of radius R lies in x-y plane with its centre at origin. Its moment of inertia about the axis x= 2R and y=0 is equal to the moment of inertia about the axis y=d and z=0. Where d is equal to
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physics-General
chemistry-
Ionisation energies of Ni and Pt in kJ mol–1 are given below
Ionisation energies of Ni and Pt in kJ mol–1 are given below
chemistry-General
physics-
A block of mass 12 kg is attached to a string wrapped around a wheel of radius 10 cm. The acceleration of the block moving down the inclined plane is 
. The tension in the string is (I of wheel 
kg 
)
A block of mass 12 kg is attached to a string wrapped around a wheel of radius 10 cm. The acceleration of the block moving down the inclined plane is . The tension in the string is (I of wheel kg )
physics-General
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' O ' is the center of a square ABCD.
and 
are four forces acting along the sides AB, BC, CD and AD as shown in figure. What should be the magnitude of so that, the total torque about 'O' is zero ?
' O ' is the center of a square ABCD. and are four forces acting along the sides AB, BC, CD and AD as shown in figure. What should be the magnitude of so that, the total torque about 'O' is zero ?
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A cylinder of mass M and radius R starts falling under gravity at t=0 as shown in figure. If the mass of chord is negligible, the tension in each string is
A cylinder of mass M and radius R starts falling under gravity at t=0 as shown in figure. If the mass of chord is negligible, the tension in each string is
physics-General
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A block of mass 2 kg hangs from the rim of a wheel of radius 0.5 m. On releasing from rest, the block falls through 5 m height in 2 s. The M.I. of the wheel will be
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physics-General
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A rod is free to rotate about 'O' as shown. It begins to rotate. When it has turned through an angle '
' its angular velocity 'w' is given as
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physics-General
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As shown in figure, a stick half of which is made of wood and other half of iron is pivoted as shown in fig. (A) It is pivoted at wooden end and force is applied to the other end of it at right angles to its length. (B) It is pivoted at iron end and the same force is applied to the other end at right angles to its length. Then angular acceleration produced is
As shown in figure, a stick half of which is made of wood and other half of iron is pivoted as shown in fig. (A) It is pivoted at wooden end and force is applied to the other end of it at right angles to its length. (B) It is pivoted at iron end and the same force is applied to the other end at right angles to its length. Then angular acceleration produced is
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' O ' is the centre of an equilateral triangle ABC 
and 
are three forces acting along the sides AB, BC and AC as shown in figure. What should be the magnitude of , so that the total torque about ' O ' is zero ?
' O ' is the centre of an equilateral triangle ABC and are three forces acting along the sides AB, BC and AC as shown in figure. What should be the magnitude of , so that the total torque about ' O ' is zero ?
physics-General
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A wheel of radius 0.4 m can rotated freely about its axis as shown in the figure. A string is wrapped over its rim and a mass of 4 kg is hung, An angular acceleration of 8 rad- 
is produced in it due to the torque. Then moment inertia of the wheel is 
A wheel of radius 0.4 m can rotated freely about its axis as shown in the figure. A string is wrapped over its rim and a mass of 4 kg is hung, An angular acceleration of 8 rad- is produced in it due to the torque. Then moment inertia of the wheel is
physics-General
