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Two discs, each having moment of inertia 5kgm^2. about its central axis, rotating with speeds 10rads^−1 and 20rads^−1, are brought in contact face to face with their axes of rotation coincided. The loss of kinetic energy in the process is
27
Nov
Two discs, each having moment of inertia 5kgm^2. about its central axis, rotating with speeds 10rads^−1 and 20rads^−1, are brought in contact face to face with their axes of rotation coincided. The loss of kinetic energy in the process is are brought in contact face to face with their axes of rotation coincided. The loss [...]
Two rigid bodies A and B rotate with angular momenta LA and LB respectively. The moments of inertia of A and B about the axes of rotation are IA and IB respectively. If IA = IB /4 and LA = 5LB . Then the ratio of rotational kinetic energy KA of A to the rotational energy KB of B is given by
27
Nov
Two rigid bodies A and B rotate with angular momenta LA and LB respectively. The moments of inertia of A and B about the axes of rotation are IA and IB respectively. If IA = IB /4 and LA = 5LB . Then the ratio of rotational kinetic energy KA of A to the [...]
A solid sphere rolls down two different inclined planes of the same height but of different inclinations
27
Nov
A solid sphere rolls down two different inclined planes of the same height but of different inclinations A solid sphere rolls down two different inclined planes of the same height but of different inclinations November 27, 2020 Category: Cengage JEE Mains Physics by B.M Sharma , Chapter 9 - Rotational Dynamics ,
Two bodies of masses 10 kg and 20 kg respectively, kept on a smooth, horizontal surface are tied to the ends of a light string. A horizontal force F = 600 N is applied to (i) A (ii) B along the direction of string. What is the tension in the string in each case?
27
Nov
Two bodies of masses 10 kg and 20 kg respectively, kept on a smooth, horizontal surface are tied to the ends of a light string. A horizontal force F = 600 N is applied to (i) A (ii) B along the direction of string. What is the tension in the string in each case? horizontal [...]
The rolling object rolls without slipping down an inclined plane (angle of inclination θ), then the minimum acceleration it can have is :
27
Nov
The rolling object rolls without slipping down an inclined plane (angle of inclination θ), then the minimum acceleration it can have is : The rolling object rolls without slipping down an inclined plane (angle of inclination θ) then the minimum acceleration it can have is : November 27, 2020 Category: Cengage JEE Mains Physics by [...]
Figure shows the position-time graph of a particle of mass 4kg. What is the (a) force on the particle for t4s,0
27
Nov
Figure shows the position-time graph of a particle of mass 4kg. What is the (a) force on the particle for t4s,0 Figure shows the position-time graph of a particle of mass 4kg. What is the (a) force on the particle for t4s November 27, 2020 Category: Chapter 4 - Laws of Motion , NCERT Exemplar [...]
In the figure shown, a ball without sliding on a horizontal surface. It ascends a curved track up to a height h and returns. The value of h is h1 for sufficiently rough curved track to avoid sliding and is h2 for smooth curved track, then.
27
Nov
In the figure shown, a ball without sliding on a horizontal surface. It ascends a curved track up to a height h and returns. The value of h is h1 for sufficiently rough curved track to avoid sliding and is h2 for smooth curved track, then. In the figure shown then the initial angular acceleration [...]
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In the figure shown ,
then the initial angular acceleration of the board is: (Neglect weight of board) ,
thereby destroying balance ,
Three children are sitting on a see-saw in such a way that it is balanced. A 20kg and a 30kg boy are on opposite sides at a distance of 2m from the pivot. If the third boy jumps off ,
A man of mass 70 kg stands on a weighing scale in a lift which is moving.
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Nov
A man of mass 70 kg stands on a weighing scale in a lift which is moving. A man of mass 70 kg stands on a weighing scale in a lift which is moving. November 27, 2020 Category: Chapter 4 - Laws of Motion , NCERT Exemplar Class 11 , Physics ,
A truck starts from rest and accelerate uniformly with 2ms^−2 . At t = 10 s a stone is dropped by a person standing on the top of the truck (6 m high from ground) . What are the (a) velocity and (b) acceleration of the stone at t = 11 s ? Neglect air resistance .
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Nov
A truck starts from rest and accelerate uniformly with 2ms^−2 . At t = 10 s a stone is dropped by a person standing on the top of the truck (6 m high from ground) . What are the (a) velocity and (b) acceleration of the stone at t = 11 s ? Neglect air [...]
A bob of mass 0.1 kg hung from the ceiling of a room by a string 2 m long is set into oscillation The speed of the bob at its mean position 1m/s .What is the trajectory of the bob if the string is cut when the bob is (a) at one of its extreme position (b) at is mean position ?
27
Nov
A bob of mass 0.1 kg hung from the ceiling of a room by a string 2 m long is set into oscillation The speed of the bob at its mean position 1m/s .What is the trajectory of the bob if the string is cut when the bob is (a) at one of its extreme [...]