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Laws of Motion
Question
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Proper inflation of tyres of vehicles saves fuel. Why?

Answer

When the tyres are not properly inflated, the tyres get flattened at these points the area of contact increases. Hence, the rolling friction increases due to increase in the area of contact.
When tyres are properly inflated, the area of contact decreases and, therefore, force of rolling friction decreases. 

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Some More Questions From Laws of Motion Chapter

When the branches of an apple tree are shaken, the apples fall down. Why?

A person jumping out from a moving car or bus falls forward. Why?

Due to what type of inertia, the spark leaves the grind stone tangentially while sharpening the knife?

Which law of motion is also called law of inertia?

What is measure of inertia of body?

Which law of motion defines the force?

What happens to a stone tied to the end of string and whirled in a circle if the string suddenly breaks?

Which law of motion gives the quantitative knowledge of force?

Which law of motion is the real law of motion?

Which law of motion gives the quantitative definition of force?