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Standard VIII

Physics

Factors Affecting Friction

F1 is the for...

Question

$F_{1}$ is the force of friction on a box just before it starts sliding, and $F_{2}$ is the force of friction when it starts sliding. Which of the following is incorrect about $F_{1}$ and $F_{2}$ ?

F_{1}

is static friction, and

F_{2}

is sliding friction.

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F_{1}

F_{2}

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F_{1}

F_{2}

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F_{2}

acts in same direction as

F_{1}

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Solution

The correct option is C $F_{1}$ = $F_{2}$

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Similar questions

Q. The minimum force required to start pushing a body up a rough (frictional coefficient

μ

) inclined plane is

F_{1}

while the minimum force needed to prevent it from sliding down is

F_{2}

. If the inclined plane makes an angle

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from the horizontal such that

tan θ = 2 μ

then the ratio

\frac{F_{1}}{F_{2}}

is :

Q. The minimum force required to start pushing a body up a rough (Friction coefficient

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while the minimum force needed to prevent it from sliding down is

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μ

) inclined plane is

F_{1}

while the minimum force needed to prevent it from sliding down is

F_{2}

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a wooden block on a horizontal surface just starts sliding by applying a force F₁from east direction. If the same process is repeated with a force from north direction and south direction respectively and the recorded forces are F₂ and F_3.Then on comparing the three forces the observation will be

a. F₁=F₂=F₃ b. F₁F₂F₃ c. F₁23 d. F₂1F₃

Q. A horizontal force of 20 N is applied on a box placed on a flat surface and it just starts to move. What will be the value of sliding friction?

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F1 is the force of friction on a box just before it starts sliding, and F2 is the force of friction when it starts sliding. Which of the following is incorrect about F1 and F2?

The correct option is C F1 = F2

$F_{1}$ is the force of friction on a box just before it starts sliding, and $F_{2}$ is the force of friction when it starts sliding. Which of the following is incorrect about $F_{1}$ and $F_{2}$ ?

The correct option is C $F_{1}$ = $F_{2}$