Home
Class 11
PHYSICS
A disc rotating about its axis with angu...

A disc rotating 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 ?

A

`v_A gt v_B gt v_C`

B

`v_A lt v_B lt v_C`

C

`v_A = v_B lt v_C`

D

`v_A = v_B gt v_C`

Text Solution

Verified by Experts

The correct Answer is:
D
Velocity at point on the disc, v =`romega` where r is the distance of point from O.
`therefore v_(A)=Romega_(0)`
`v_(B)=Romega_(0)`
`v_(C)=R/2omega_(0)`
`therefore v_(A)=v_(B) gt v_(C)`
Promotional Banner

Topper's Solved these Questions

  • SYSTEM OF PARTICLES AND ROTATIONAL MOTIONS

    NCERT FINGERTIPS|Exercise Torque And Angular Momentum|11 Videos

  • SYSTEM OF PARTICLES AND ROTATIONAL MOTIONS

    NCERT FINGERTIPS|Exercise Equilibrium Of A Rigid Body|13 Videos

  • SYSTEM OF PARTICLES AND ROTATIONAL MOTIONS

    NCERT FINGERTIPS|Exercise Centre Of Mass|8 Videos

  • PRACTICE PAPERS

    NCERT FINGERTIPS|Exercise Practice Paper 3|50 Videos

  • THERMAL PROPERTIES OF MATTER

    NCERT FINGERTIPS|Exercise Assertion And Reason|10 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

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 disc of mass 1 kg and radius 10 cm is rotating about its axis with an anuglar velocity of 2 rad/s. The linear momentum of the disc,

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 is rolling without slipping with linear velocity v as shown in figure. With the concept of instantaneous axis of rotation, find velocities of point A, B, C and D.