Home
Class 11
PHYSICS
A disc is given an initial angular veloc...

A disc is given an initial angular velocity `omega_(0)` and placed on a rough horizontal surface as shown Fig. The quantities which will not depend on the coefficient of friction is/are

A

The time until rolloing begins

B

The displacement of the disc until rolling begins.

C

The velocity when rolling begins

D

The work done by the force of friction

Text Solution

Verified by Experts

The correct Answer is:
C, D
Promotional Banner

Similar Questions

Explore conceptually related problems

We have a disc of neglligible thickness and whose surface mass density varies as radial disance from centre as sigma=sigma_(0)(1+r/R) , where R is the radius of the disc. Specific heat of the material of the disc is C . Disc is given an angular velocity omega_(0) and placed on a horizontal rough surface such that the plane of the disc is parallel to the surface. Coefficient of friction between disc and suface is mu . The temperature of the disc is T_(0) . Answer the following question on the base of information provided in the above paragraph Magnitude of angular acceleration of disc is

We have a disc of neglligible thickness and whose surface mass density varies as radial distance from centre as sigma=sigma_(0)(1+r/R) , where R is the radius of the disc. Specific heat of the material of the disc is C . Disc is given an angular velocity omega_(0) and placed on a horizontal rough surface such that the plane of the disc is parallel to the surface. Coefficient of friction between disc and suface is mu . The temperature of the disc is T_(0) . Answer the following question on the base of information provided in the above paragraph If the kinetic energy lost due to the friction between disc and surface is absorbed by the disc the moment heat is generated, by the mass lying at the point where the energy is lost. Assume that there is no radial heat flow in betwen disc particles. Rate of change in temperature at a point lying at r distance away from centre with time, before disc stops rotating, will be ( alpha -magnitude of angular acceleration of rod)

A uniform disc of mass m and radius R is rotated about an axis passing through its center and perpendicular to its plane with an angular velocity omega_() . It is placed on a rough horizontal plane with the axis of the disc keeping vertical. Coefficient of friction between the disc and the surface is mu , find (a). The time when disc stops rotating (b). The angle rotated by the disc before stopping.

A uniform disc of radius R is spinned to the angular velocity omega and then carefully placed on a horizontal surface. How long will the disc be rotating on the surface if the friction coeffiecient is equal to k ? The pressure exerted by the disc on the surface can be regarded as uniform.

A hoop of radius r mass m rotating with an angular velocity omega_(0) is placed on a rough horizontal surface. The initial velocity of the centre of the hoop is zero. What will be the velocity of the centre of the hoop when it cases to slip ?

A block is sliding on a rough horizontal surface. If the contact force on the block is sqrt2 times the frictional force, the coefficient of friction is

A ring of radius R is first rotated with an angular velocity omega and then carefully placed on a rough horizontal surface. The coefficient of friction between the surface and the ring is mu . Time after which its angular speed is reduced to half is

A disc is given an angular velocity omega_(0) and a linear velocity v_(0) as shown in the figure. It is released on a rough horizontal surface of friction coefficient mu. Mark the correct statement (omega_(0)=3v_(0)//R)

A disc is rotated about its axis with a certain angular velocity and lowered gently on a rough inclined plane as shown in Fig., then

A disc is rotated about its axis with a certain angular velocity and lowered gently on a rough inclined plane as shown in Fig., then