Home
Class 11
PHYSICS
A disc roating about its axis with angul...

A disc roating about its axis with angular speed `omega_(0)` is placed lightly (without any translational pull) on a perfectly frictionless table. The radius of the disc is `R`. What are the linear velocities of the points `A, B and C` on the disc shown in Fig. Will the disc roll in the direction indicated ?

Text Solution

Verified by Experts

Using the relation `v = r omega`, we get
For point `A, v_(A) = R omega_(0)`, along `AX`
For point `B, v_(B) = R omega_(0)`, along `bX'`
For point `C, v_(c ) = ((R )/(2)) omega_(0)` parallel to `AX`,
The disc will not rotate, because it is placed on a perfectly frictionless table. without friction, rolling is not possible.
Promotional Banner

Topper's Solved these Questions

  • SYSTEMS OF PARTICLES AND ROTATIONAL MOTION

    PRADEEP|Exercise QUESTIONS|15 Videos

  • SYSTEMS OF PARTICLES AND ROTATIONAL MOTION

    PRADEEP|Exercise VALUE BASED QUESTIONS|5 Videos

  • SYSTEMS OF PARTICLES AND ROTATIONAL MOTION

    PRADEEP|Exercise NCERT|21 Videos

  • RAY OPTICS

    PRADEEP|Exercise Problem For Practice(a)|25 Videos

  • THERMODYNAMICS

    PRADEEP|Exercise Assertion- Reason Type Questions|19 Videos

Similar Questions

Explore conceptually related problems

A disc rotating about its axis with angular speed omega_0 is placed lightly (without any translational push) on a perfectly frictionless table. The radius of the disc is R . What are on the disc shown . Will the disc roll in the direction indicated?

A disc of radius R rolls without slipping at speed v along positive x -axis. Velocity of point P at the instant shown in Fig. is

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

Two point P and Q. diametrically opposite on a disc of radius R have linear velocities v and 2v as shown in figure. Find the angular speed of the disc.

A disc of radius R is rotating with an angular speed omega_(0) about a horizontal axis. It is placed on a horizontal table. The coefficient of kinetic friction is mu_(k) . (a) What was the velocity of its centre of mass before being brought in contact with the table ? (b) What happens to the linear velocity of a point on its rim when placed in contact with the table ? (c ) What happens to the linear speed of the centre of mass when disc is placed in contact with the table ? (d) Which force i sresponsible for the effects in (b) and (c ). (e) What condition should be satisfied for rolling to begin ? (f) Calculate the time taken for the rolling to begin.

A circular disc is rotating without friction about its natural axis with an angular velocity omega . Another circular disc of same material and thickness but half the raduis is gently placed over it coaxially. The angular velocity of composite disc will be

A nonconducing disc of radius R is rotaing about axis passing through its cente and perpendicual its plance with an agular velocity omega . The magnt moment of this disc is .

A uniiform disc of radius r spins with angular velocity omega and angular acceleration alpha . If the centre of mass of the disc has linear acceleration a , find the magnitude and direction of aceeleration of the point 1,2 , and 3 .

A disc of radius R has linear velocity v and angular velocity omega as shown in the figure. Given upsilon=romega find velocity of point A, B, C and D on the disc.