Class 9 Science | Inertia

Science and Technology, Class 9

Inertia

Unit 7 · Force and Motion · Why objects resist change

Think About It

The Swing and the Fan

SWING

A swing set going does not stop at once; it takes time to come to rest.

FAN

A fan neither spins at full speed the moment it is switched on nor stops the moment it is switched off.

ASK

Why does an object refuse to change its state at once?

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The notes are free to read in full.

Presenter notes: Today we talk about a curious habit of objects. Why does no object change its state instantly? That habit has a name: inertia.