Home
Class 12
PHYSICS
Statement-1: Friction is necessary for a...

Statement-1: Friction is necessary for a body to roll purely on a level horizontal ground.
Statement-2: When the body is rolling purely, the velocity of the point of contact should be zero relative to the surface in contact.

A

Statement-1 is true, statement-2 is true and statement-2 is correct explanation for statement-1.

B

Statement-1 is true, statement-2 is true and statement-2 is NOT the correct explanation for statement-1.

C

Statement-1 is true, statement-2 is false.

D

Statement -1 is false, statement -2 is true.

Text Solution

Verified by Experts

The correct Answer is:
D
No, friction only act when there is tendency to slepe
Doubtnut Promotions Banner Mobile Dark
|

Topper's Solved these Questions

  • MASTER PRACTICE PROBLEM

    BANSAL|Exercise Multiple objective|131 Videos

  • MASTER PRACTICE PROBLEM

    BANSAL|Exercise Subjective|107 Videos

  • MASTER PRACTICE PROBLEM

    BANSAL|Exercise Comphrehension|134 Videos

  • FLUID MECHANICS

    BANSAL|Exercise PYQS AIEEE|10 Videos

  • SEMICONDUCTORS

    BANSAL|Exercise CBSE Question|32 Videos

Similar Questions

Explore conceptually related problems

During rolling without slipping, what is the velocity of the point in contact with the surface.

A wheel rolls purely on ground. Find a point on the periphery of a body which has a velocity equal to the velocity of the centre of mass of the body.

Knowledge Check

  • In Fig. the velocities are in ground frame and the cylinder is performing pure rolling on the plank, velocity of point 'A' would be

    A
    `2V_(C)`
    B
    `2V_(C)+V_(P)`
    C
    `2V_(C)+V_(P)`
    D
    `2(V_(C)-V_(P))`

  • If a body (ball) is rolling on a surface without slipping, no frictional force acts on it In the case of rolling without slipping point of contacts are relatively at rest.

    A
    Statement-1 is True, Statement-2 is Ture , Statement -2 is a correct explanation for statement -1.
    B
    Statement-1 is True, Statement-2 is True , Statement-2 is NOT a correct explanation fro Statement -1.
    C
    Statement-1 is True, Statement-2 is False.
    D
    Statement-1 is False, Statement-2 is True.

  • A wheel of radius 1 m rolls forward half a revolution on a horizontal ground. The magnitude of the displacement of the point of the wheel initially on contact with the ground is.

    A
    `pi`
    B
    `2 pi`
    C
    `sqrt(2) pi`
    D
    `sqrt(pi^2 + 4)`

    • Similar Questions

    Explore conceptually related problems

    When a body rolls, on a stationary ground, the acceleration of the point of contact is always zero. Is this statement true or false?

    A disc of radius R is rolling purely on a flat horizontal surface, with a constant angular velocity the angle between the velocity ad acceleration vectors of point P is

    A sphere is rolling without slipping on a fixed horizontal plane surface. In the figure, A is the point of contact, B is the centre of the sphere and C is its topmost point. Then :

    A sphere is rolling without slipping on a fixed horizontal plane surface. In the figure, A is the point of contact, B is the centre of the sphere and C is its topmost point. Then

    A sphere is rolling without slipping on a fixed horizontal plane surface. In the figure, A is the point of contact. B is the centre of the sphere and C is its topmost point. Then .

    Home
    Profile