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Frictional force is the force that opposes 

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Important Questions on Motion and Force

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Science>Physics>Motion and Force>Frictional Force
If you apply the force along the right, the friction acts along the ______ direction.
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Science>Physics>Motion and Force>Frictional Force
Why is heat produced when we rub our hands together?
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Science>Physics>Motion and Force>Frictional Force
Friction causes no damage to tyres, soles of shoes, or machine parts.
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Science>Physics>Motion and Force>Frictional Force
Friction opposes the relative motion
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Science>Physics>Motion and Force>Frictional Force
What is frictional force? What are its advantages and disadvantages?
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Science>Physics>Motion and Force>Frictional Force
Why do we slip on a wet floor?
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Science>Physics>Motion and Force>Frictional Force
The centre of mass of a system cannot change its state of motion, unless there is an external force acting on it. Yet the internal force of the brakes can bring car to rest. Then 
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Science>Physics>Motion and Force>Frictional Force
Tyres and soles of shoes wear out because of friction.
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Science>Physics>Motion and Force>Frictional Force
_____ (Friction/gravity) makes it hard to slide a heavy object across a surface.
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Science>Physics>Motion and Force>Frictional Force
What makes it hard to slide heavy objects across the floor?
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Science>Physics>Motion and Force>Frictional Force

Friction can also produce?

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Science>Physics>Motion and Force>Frictional Force
A force that can slow down the movement of an object _____.
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Science>Physics>Motion and Force>Frictional Force
List any two advantages and two disadvantages of friction.
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Science>Physics>Motion and Force>Frictional Force

Select the appropriate words for the blanks.

The frictional force also depends on the _____ of the object and the _____ of the fluid.

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Science>Physics>Motion and Force>Frictional Force
Electrostatic force makes it possible for us to walk.
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Science>Physics>Motion and Force>Frictional Force
List any two advantages and two disadvantages of friction.
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Science>Physics>Motion and Force>Frictional Force
Cotyledons are also called-
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Science>Physics>Motion and Force>Frictional Force
It is difficult to walk on a wet floor. Why?
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Science>Physics>Motion and Force>Frictional Force
Why are machine parts oiled?
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Science>Physics>Motion and Force>Frictional Force
What is friction?