Chapter - 2 Friction

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Q
Friction

Question:

Four children were asked to arrange forces due to rolling, static and sliding frictions in a decreasing order. Their arrangements are given below. Choose the correct arrangement.

(a) rolling, static, sliding

(b) rolling, sliding, static

(c) static, sliding, rolling

(d) sliding, static, rolling 

Answer:

(c) static, sliding, rolling

Static friction: The force required to overcome friction at the instant an object starts moving from rest is a measure of static friction.

Sliding Friction: The force required to keep an object moving at the same speed is called sliding friction. The sliding friction is slightly less than the static friction.

Rolling Friction: When one body rolls over the surface of another body, the resistance to its motion is called rolling friction. The rolling friction is less than the sliding friction.


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