Inertia
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Inertia is a property of matter that causes it to resist changes in velocity; or, in other words, the resistance against being set in motion, and resistance to being stopped when in motion.[1]
Newton discovered that bodies which have equal heaviness have equal inertia, i.e. that if the property of inertia is possed to an equal degree by two different substances, the have equal heaviness. One of his proofs was founded on the celebrated guinea and feather experiment, showing that the guinea and feather fall at the same rate when the resistance of the air is removed. Another was founded upon making pendulums of different substances—lead, iron, and wood to vibrate, and observing their times of vibration.[1]
References
- ↑ 1.0 1.1 W. Thomson (Lord Kelvin) (August 25, 1882). August 25, 1882. The British Association, The Glasgow Science Lectures Association.
