JEE Mains Physics 2002-2019 Solved Video Solutions
Let the moment of inertia of a hollow cylinder of length 30 cm (inner radius 10 cm and outer radius 20 cm), about its axis be I. The radius of a thin cylinder of the same mass such that its moment of inertia about its axis is also I, is:
29
Nov
Let the moment of inertia of a hollow cylinder of length 30 cm (inner radius 10 cm and outer radius 20 cm), about its axis be I. The radius of a thin cylinder of the same mass such that its moment of inertia about its axis is also I, is: about its axis be I. [...]
A string is wound around a hollow cylinder of mass 5 kg and radius 0.5 m. If the string is now pulled with a horizontal force of 40 N, and the cylinder is rolling without slipping on a horizontal surface (see figure), then the angular acceleration of the cylinder will be (Neglect the mass and thickness of the string) :-
29
Nov
A string is wound around a hollow cylinder of mass 5 kg and radius 0.5 m. If the string is now pulled with a horizontal force of 40 N, and the cylinder is rolling without slipping on a horizontal surface (see figure), then the angular acceleration of the cylinder will be (Neglect the mass and [...]
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A string is wound around a hollow cylinder of mass 5 kg and radius 0.5 m. If the string is now pulled with a horizontal force of 40 N ,
and the cylinder is rolling without slipping on a horizontal surface (see figure) ,
then the angular acceleration of the cylinder will be (Neglect the mass and thickness of the string) :- ,
The magnitude of torque on a particle of mass 1kg is 2.5 Nm about the origin. If the force acting on it is 1 N, and the distance of the particle from the origin is 5m, then the angle between the force and the position vector is (in radians) :-
29
Nov
The magnitude of torque on a particle of mass 1kg is 2.5 Nm about the origin. If the force acting on it is 1 N, and the distance of the particle from the origin is 5m, then the angle between the force and the position vector is (in radians) :- and the distance of the [...]
A circular disc D1 of mass M and radius R has two identical discs D2 and D3 of the same mass M and radius R attached rigidly at its opposite ends (see figure). The moment of inertia of the system about the axis OO’, passing through the centre of D1, as shown in the figure, will be:-
29
Nov
A circular disc D1 of mass M and radius R has two identical discs D2 and D3 of the same mass M and radius R attached rigidly at its opposite ends (see figure). The moment of inertia of the system about the axis OO’, passing through the centre of D1, as shown in the figure, [...]
A slab is subjected to two forces F→1andF→2 of same magnitude F as shown in the figure . Force F→2 is in XY-plane while force F1 acts along z-axis at the point (2I→+3j→) .The moment of these forces about point O will be :
29
Nov
A slab is subjected to two forces F→1andF→2 of same magnitude F as shown in the figure . Force F→2 is in XY-plane while force F1 acts along z-axis at the point (2I→+3j→) .The moment of these forces about point O will be : A person of mass M is assuming that his centre of [...]
A rigid massless rod of length 3l has two masses attached at each end as shown in the figure. The rod is pivoted at point P on the horizontal axis (see figure). When released from initial horizontal position, its instantaneous angular acceleration will be :
29
Nov
A rigid massless rod of length 3l has two masses attached at each end as shown in the figure. The rod is pivoted at point P on the horizontal axis (see figure). When released from initial horizontal position, its instantaneous angular acceleration will be : A person of mass M is assuming that his centre [...]
Two identical spherical balls of mass M and radius R each are stuck on two ends of a rod of length 2R and mass M (see figure). The moment of inertia of the system about the axis passing perpendicularly through the centre of the rod is :
29
Nov
Two identical spherical balls of mass M and radius R each are stuck on two ends of a rod of length 2R and mass M (see figure). The moment of inertia of the system about the axis passing perpendicularly through the centre of the rod is : A person of mass M is assuming that [...]
A homogeneous solid cylindrical roller of radius R and mass M is pulled on a cricket pitch by a horizontal force. Assuming rolling without slipping, angular acceleration of the cylinder is:
29
Nov
A homogeneous solid cylindrical roller of radius R and mass M is pulled on a cricket pitch by a horizontal force. Assuming rolling without slipping, angular acceleration of the cylinder is: A homogeneous solid cylindrical roller of radius R and mass M is pulled on a cricket pitch by a horizontal force. Assuming rolling without [...]
A rod of length 50cm is pivoted at one end. It is raised such that if makes an angle of 30° from the horizontal as shown and released from rest. Its angular speed when it passes through the horizontal (in rad s^−1) will be (g=10ms^−2)
29
Nov
A rod of length 50cm is pivoted at one end. It is raised such that if makes an angle of 30° from the horizontal as shown and released from rest. Its angular speed when it passes through the horizontal (in rad s^−1) will be (g=10ms^−2) A person of mass M is assuming that his centre [...]
An L-shaped object, made of thin rods of uniform mass density, is suspended with a string as shown in figure. If AB=BD, and the angle made by AB with downward vertical is θ, then :
29
Nov
An L-shaped object, made of thin rods of uniform mass density, is suspended with a string as shown in figure. If AB=BD, and the angle made by AB with downward vertical is θ, then : An L-shaped object and the angle made by AB with downward vertical is θ is suspended with a string as [...]