When a bicycle is in motion, force of friction exerted by ground on two wheels is such that it acts

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4-2.Friction

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When a bicycle is in motion, the force of friction exerted by the ground on the two wheels is such that it acts

AIn the backward direction on the front wheel and in the forward direction on the rear wheel

BIn the forward direction on the front wheel and in the backward direction on the rear wheel

CIn the backward direction on both front and the rear wheels

DBoth $(a)$ and $(c)$

(IIT-1990)

Solution

(d) In cycling, the rear wheel moves by the force communicated to it by pedalling while front wheel moves by it self. So, while pedalling a bicycle, the force exerted by rear wheel on ground makes force of friction act on it in the forward direction (like walking). Front wheel moving by itself experience force of friction in backward direction (like rolling of a ball). [However, if pedalling is stopped both wheels move by themselves and so experience force of friction in backward direction].

Standard 11

Physics

Write relation between coefficient of static friction, kinetic friction and rolling friction.

hard

Consider a block and trolley system as shown in figure. If the coefficient of kinetic friction between the trolley and the surface is $0.04$ , the acceleration of the system in $\mathrm{ms}^{-2}$ is :

(Consider that the string is massless and unstretchable and the pulley is also massless and frictionless):

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(JEE MAIN-2024)

A man pulls a block heavier than himself with a light horizontal rope. The coefficient of friction is the same between the man and the ground, and between the block and the ground

hard

Calculate the acceleration (In $m/s^{2}$) of the block and trolly system shown in the figure. The coefficient of kinetic friction between the trolly and the surface is $0.05 .\left( g =10\; m / s ^{2},\right.$ mass of the string is negligible and no other friction exists).

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(NEET-2020)

$STATEMENT-1$ It is easier to pull a heavy object than to push it on a level ground. and

$STATEMENT-2$ The magnitude of frictional force depends on the nature of the two surfaces in contact.

medium

(IIT-2008)

When a bicycle is in motion, the force of friction exerted by the ground on the two wheels is such that it acts

Solution

Similar Questions

Write relation between coefficient of static friction, kinetic friction and rolling friction.

A man pulls a block heavier than himself with a light horizontal rope. The coefficient of friction is the same between the man and the ground, and between the block and the ground

Calculate the acceleration (In $m/s^{2}$) of the block and trolly system shown in the figure. The coefficient of kinetic friction between the trolly and the surface is $0.05 .\left( g =10\; m / s ^{2},\right.$ mass of the string is negligible and no other friction exists).

$STATEMENT-1$ It is easier to pull a heavy object than to push it on a level ground. and $STATEMENT-2$ The magnitude of frictional force depends on the nature of the two surfaces in contact.

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$STATEMENT-1$ It is easier to pull a heavy object than to push it on a level ground. and

$STATEMENT-2$ The magnitude of frictional force depends on the nature of the two surfaces in contact.