Science>Physics>Force and Laws of Motion>Types of Friction

EASY

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Kinetic friction is directly proportional to

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Important Questions on Force and Laws of Motion

EASY

Science>Physics>Force and Laws of Motion>Types of Friction

Which of the following surface in contact has maximum coefficient of friction

(μ)

?

EASY

Science>Physics>Force and Laws of Motion>Types of Friction

Frictional forces act in a direction

EASY

Science>Physics>Force and Laws of Motion>Types of Friction

Which of the following surface in contact has maximum coefficient of friction

(μ)

?

EASY

Science>Physics>Force and Laws of Motion>Types of Friction

A person is managing to be at rest between two vertical walls by pressing one wall by his hands and feet and second wall with his back. The coefficient of friction is

0.5

between his body and the wall. If the force with which the person pushes the wall is

500 N,

then the mass of the person is (Take

g = 10 m s^{- 2}

)

EASY

Science>Physics>Force and Laws of Motion>Types of Friction

The coefficient of friction

' μ'

and the angle of friction

' λ'

are related by _______

HARD

Science>Physics>Force and Laws of Motion>Types of Friction

The coefficient of static friction between two blocks is $0.5$ and the table is smooth. The maximum horizontal force that can be applied to move the blocks together is _______ $N$ (take $g = 10 {m s}^{- 2})$

Question Image

EASY

Science>Physics>Force and Laws of Motion>Types of Friction

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What is the maximum force

F

that can be applied on block

m_{1},

so that both

m_{1} & m_{2}

will move together? There is no friction between

m_{1}

and the horizontal table. The coefficient of friction between

' m_{1}'

and

' m_{2}'

is

μ .

MEDIUM

Science>Physics>Force and Laws of Motion>Types of Friction

An inclined plane is bent in such a way that the vertical cross-section is given by

y = \frac{x^{2}}{4}

, where

y

is in vertical and

x

in horizontal direction. If the upper surface of this curved plane is rough with coefficient of friction

μ = 0.5,

the maximum height in

cm

at which a stationary block will not slip downward is________

cm .

EASY

Science>Physics>Force and Laws of Motion>Types of Friction

Angle of repose and angle of friction are equal.

HARD

Science>Physics>Force and Laws of Motion>Types of Friction

A block of mass

2 kg

is placed on the floor. The coefficient of static friction is

0.4

. If a force of

2.8 N

is applied on the block parallel to floor the force of friction between the block and floor (taking

g = 10 m s^{- 2}

) is :

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Science>Physics>Force and Laws of Motion>Types of Friction

What are the cause of rolling friction?

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Science>Physics>Force and Laws of Motion>Types of Friction

What is coefficient of kinetic friction.

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Science>Physics>Force and Laws of Motion>Types of Friction

Which friction of the following is the highest?

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Science>Physics>Force and Laws of Motion>Types of Friction

The minimum angle that an inclined plane makes with the horizontal when a body placed on it just begins to slide down is called _____.

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Science>Physics>Force and Laws of Motion>Types of Friction

Rolling friction is?

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Science>Physics>Force and Laws of Motion>Types of Friction

What is rolling friction?

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Science>Physics>Force and Laws of Motion>Types of Friction

A ball rolling along the ground gradually slows down and finally comes to rest,

MEDIUM

Science>Physics>Force and Laws of Motion>Types of Friction

The force of friction will increase when two surfaces are

EASY

Science>Physics>Force and Laws of Motion>Types of Friction

Two objects $A$ and $B$ are moving on a rough surface as shown in the figure. The object $A$ has greater velocity than $B$ then _____.

Question Image

EASY

Science>Physics>Force and Laws of Motion>Types of Friction

What are the different types of frictional force.