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Byju's Answer

Standard XIII

Physics

Finding Friction's Direction

A tire rolls ...

Question

A tire rolls on a flat road with constant angular velocity $ω$ (in counter clockwise direction) and velocity $v$ (towards left). If $v > ω R$ , in which direction does the friction from the road act on the tire?

Towards left

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Towards right

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Friction does not act on the tire

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Can't say

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Solution

The correct option is B Towards right
Diagram shows the velocity at lowest point.
As $v > ω r, v_{n e t}$ or tendency of slipping is towards left. Hence, friction will be towards right.

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A tire rolls on a flat road with constant angular velocity ω (in counter clockwise direction) and velocity v (towards left). If v>ωR, in which direction does the friction from the road act on the tire?

The correct option is B Towards rightDiagram shows the velocity at lowest point. As v>ωr,vnet or tendency of slipping is towards left. Hence, friction will be towards right.

A tire rolls on a flat road with constant angular velocity $ω$ (in counter clockwise direction) and velocity $v$ (towards left). If $v > ω R$ , in which direction does the friction from the road act on the tire?

The correct option is B Towards right
Diagram shows the velocity at lowest point.
As $v > ω r, v_{n e t}$ or tendency of slipping is towards left. Hence, friction will be towards right.