Question

Question 32:
Give reason for the following :
When a hanging carpet is beaten with a stick, the dust particles start coming out of it.

Lakhmir Singh Physics Class 9

Answer 1

This is because of inertia. 
A carpet when lying on floor absorbs dust from its surroundings.  This dust remain on its surface.  Later when we beat this carpet the dust particles due to the property of their mass come out.  Just think of a simple event when u r travelling in a bus and when sudden brakes are applied u move forward.  Similarly when  we beat the carpet the carpet moves back but the dust particles don't move to such an extent and come out.  The property by virtue of which an objest resist change in its state of motion is inertia. This simply works here

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Answer 2

When a hanging carpet is beaten with a stick, the dust particles start coming out of it.

The reason is that the part of yhe carpet wgere the stick strikes, comes in motion at once , while the dust particles settled on its fur , remain in position due ti inertia of rest . Thus , the part of the carpet moves ahead with the stick, leavinh behind the dust particles which fall down due to the earth's pull