Forces in action
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10. Inertia

INERTIA:
It is the reluctance to change the velocity.

It is a property of matter by which it continues in its existing state of rest or uniform motion in a straight line, unless that state is changed by an external force.

The inertia depends on its mass: a bigger mass needs a bigger force to overcome its inertia and change its motion.

 If you’re driving at 65 km/h and have an accident, the car may come to a stop in an instant, while your body is still moving at 65 km/h. Without a seatbelt, your inertia could carry you through the windshield.

This video will help you better understand inertia, motion and friction.

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