Physics-
General
Easy
Question
A uniform wheel of moment of inertia 1 as shown is pivoted on a horizontal axis through its centre so that its plane is vertical. A small mass m is stuck on the rim of the wheel as shown. The angular acceleration of the wheel when mass is at point A is 
and when mass is at point B is 
. Then
The correct answer is:
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A rod AB of length 1 m is placed at the edge of a smooth table as shown in fig. It is hit horizontally at point B. If the displacement of centre of mass in 1 s is 
. The angular velocity of the rod is 
A rod AB of length 1 m is placed at the edge of a smooth table as shown in fig. It is hit horizontally at point B. If the displacement of centre of mass in 1 s is . The angular velocity of the rod is
physics-General
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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)) :
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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 
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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 
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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
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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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Ionisation energies of Ni and Pt in kJ mol–1 are given below
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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 
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kg 
)
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' O ' is the center of a square ABCD.
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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 ?
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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
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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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A rod is free to rotate about 'O' as shown. It begins to rotate. When it has turned through an angle '
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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
physics-General
