Inertia Demonstrations

Also called

inertia · first law of motion · Newton's first law · law of inertia · inertia of rest · inertia of motion · coin on a card · tablecloth trick · bus brakes passengers lurch forward · seat belt · mass is a measure of inertia · Galileo · unbalanced force · जड़त्व · गति का पहला नियम · द्रव्यमान

Topics

• Inertia is the tendency of a body to resist any change in its state of rest or of uniform motion.
• Newton's first law: a body stays at rest or moves uniformly in a straight line unless an unbalanced force acts on it.
• A coin on a card stays put when the card is flicked away, so it drops straight into the tumbler: inertia of rest.
• A tablecloth pulled quickly slides out from under the dishes; the dishes have too little time to be dragged along.
• When a moving bus brakes, passengers lurch forward because their bodies tend to keep moving: inertia of motion.
• When a bus starts suddenly, passengers fall backward: their bodies tend to stay at rest.
• Mass is a measure of inertia: the same push moves a light box far but barely shifts a heavy crate.
• A seat belt supplies the force that slows the passenger with the vehicle, so the body does not fly forward.

About this model

A GLB file of about 186 KB, shown in Lably's 3D viewer and, on a phone, placed in your room with AR. Credit: Model, science and animation: Lably (built procedurally with three.js; no downloaded meshes). | CC BY 4.0. Original geometry and animation made for Lably.

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