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Assertion: Friction is necessary for abo...

Assertion: Friction is necessary for abody to roll on a surface.
Reason:Friction provides the necessary tangential force and torque.
Which one of the following statement is correct?

A

Assertion and reason are treu and reason explains assertion correctly.

B

Assertion and reason are true. But reason does not explain assertion correctly.

C

Assertion is true but reason is false.

D

Assertion is false but reason is true.

Text Solution

Verified by Experts

The correct Answer is:
A
To roll a body frictioin is essential. Friction provides force and torque.
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PREMIERS PUBLISHERS-MOTION OF SYSTEM OF PARTICLES AND BODIES-OTHER IMPORTANT QUESTIONS & ANSWER (MULTIPLE CHOICE QUESTIONS)
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  2. The angular momentum of a moving body remains constant if

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  3. Assertion: Friction is necessary for abody to roll on a surface. Rea...

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  4. A body is projected from the ground with some angle to the horizontal....

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  5. Kgm^(2) is the unit of ………………………….. Of a body.

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  6. Select the correct expression from the following: Moment of inertia ...

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  7. Moment of inertia of solid sphere of radius r(0) is

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  8. Choose the odd man out from the following :

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  9. If I is the moment of ienrtia, alpha is the angular acceleration and t...

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  10. A stone is tied to the end of a string of length 1 and whirled in a ho...

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  11. The dimension of torque is

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  12. If tau is the torque and theta is the angular displacement then work d...

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  14. The physical quantities related to linear motion and the physical quan...

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  15. If the moment of inertia of a body is I and its mass be M the, its rad...

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  16. Which one of the following is correct? According to perpendicular ax...

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  17. A disc rotates with angular velocity omega and kinetic energy E. Then ...

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  18. A body is projected from the ground with some angle to the horizontal....

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  19. A body cannot roll without slipping on a

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  20. Select the correct statement from the following .

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