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What are the rotational equivalents for the physical quantities, (i) mass and (ii) force? - Physics

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प्रश्न

What are the rotational equivalents for the physical quantities, (i) mass and (ii) force?

एका वाक्यात उत्तर

उत्तर

The rotational equivalents for (i) mass and (ii) force are a moment of inertia and torque respectively.

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Rotational Dynamics
  या प्रश्नात किंवा उत्तरात काही त्रुटी आहे का?
पाठ 5: Motion of System of Particles and Rigid Bodies - Evaluation [पृष्ठ २६२]

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सामाचीर कलवी Physics - Volume 1 and 2 [English] Class 11 TN Board
पाठ 5 Motion of System of Particles and Rigid Bodies
Evaluation | Q II. 15. | पृष्ठ २६२

संबंधित प्रश्‍न

Somehow, an ant is stuck to the rim of a bicycle wheel of diameter 1 m. While the bicycle is on a central stand, the wheel is set into rotation and it attains the frequency of 2 rev/s in 10 seconds, with uniform angular acceleration. Calculate:

  1. The number of revolutions completed by the ant in these 10 seconds.
  2. Time is taken by it for first complete revolution and the last complete revolution.

Answer in Brief:

A flywheel used to prepare earthenware pots is set into rotation at 100 rpm. It is in the form of a disc of mass 10 kg and a radius 0.4 m. A lump of clay (to be taken equivalent to a particle) of mass 1.6 kg falls on it and adheres to it at a certain distance x from the center. Calculate x if the wheel now rotates at 80 rpm.


A big dumb-bell is prepared by using a uniform rod of mass 60 g and length 20 cm. Two identical solid spheres of mass 25 g and radius 10 cm each are at the two ends of the rod. Calculate the moment of inertia of the dumb-bell when rotated about an axis passing through its centre and perpendicular to the length.


A hollow sphere has a radius of 6.4 m. what is the minimum velocity required by a motorcyclist at the bottom to complete the circle. 


Derive an expression for maximum safety speed with which a vehicle should move along a curved horizontal road. State the significance of it.


A railway track goes around a curve having a radius of curvature of 1 km. The distance between the rails is 1 m. Find the elevation of the outer rail above the inner rail so that there is no side pressure against the rails when a train goes around the curve at 36 km/hr. 


What is a conical pendulum? Obtain an expression for its time period


A rigid body rotates with an angular momentum L. If its kinetic energy is halved, the angular momentum becomes, ______


A particle undergoes uniform circular motion. The angular momentum of the particle remains conserved about, ______


What is the relation between torque and angular momentum?


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