मराठी
तामिळनाडू बोर्ड ऑफ सेकेंडरी एज्युकेशनएचएससी विज्ञान इयत्ता ११

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

Advertisements
Advertisements

प्रश्न

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

पर्याय

  • L

  • L/2

  • 2L

  • L/`sqrt2`

MCQ
रिकाम्या जागा भरा
Advertisements

उत्तर

A rigid body rotates with an angular momentum L. If its kinetic energy is halved, the angular momentum becomes, `underline(L/sqrt2)`.

shaalaa.com
Rotational Dynamics
  या प्रश्नात किंवा उत्तरात काही त्रुटी आहे का?
पाठ 5: Motion of System of Particles and Rigid Bodies - Evaluation [पृष्ठ २६०]

APPEARS IN

सामाचीर कलवी Physics - Volume 1 and 2 [English] Class 11 TN Board
पाठ 5 Motion of System of Particles and Rigid Bodies
Evaluation | Q I. 6. | पृष्ठ २६०

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.

The coefficient of static friction between a coin and a gramophone disc is 0.5. Radius of the disc is 8 cm. Initially the center of the coin is 2 cm away from the center of the disc. At what minimum frequency will it start slipping from there? By what factor will the answer change if the coin is almost at the rim? (use g = π2m/s2)


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.


Starting from rest, an object rolls down along an incline that rises by 3 in every 5 (along with it). The object gains a speed of `sqrt 10` m/s as it travels a distance of `5/3` m along the incline. What can be the possible shape/s of the object? 


Does the angle of banking depend on the mass of the vehicle?


During ice ballet, while in the outer rounds, why do the dancers outstretch their arms and legs.


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


A body weighing 0.5 kg tied to a string is projected with a velocity of 10 m/s. The body starts whirling in a vertical circle. If the radius of the circle is 0.8 m, find the tension in the string when the body is at the top of the circle.


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


A wheel of radius 2 cm is at rest on the horizontal surface. A point P on the circumference of the wheel is in contact with the horizontal surface. When the wheel rolls without slipping on the surface, the displacement of point P after half rotation of wheel is ______.


Share
Notifications

Englishहिंदीमराठी


      Forgot password?
Use app×