BoldItalic
First Post
Pre-17th century, physics was different. It was common sense, not mathematics, until Newton came along and ruined it.
Heavy things were exemplified by large rocks. It takes effort to move a large rock a few feet across level ground, and more effort to move it another few feet. Effort is in proportion to the weight of the rock, and how far you want to move it. Also, uphill is harder than downhill. Also, heavy things fall harder than light things. You know that if you stand under one and it falls on your head.
An immovable rod is as difficult to shift as a 4 ton rock but it doesn't fall down at all. This is easy to understand. It just doesn't like to be moved. It's stubborn.
Here endeth the physics lesson.
Heavy things were exemplified by large rocks. It takes effort to move a large rock a few feet across level ground, and more effort to move it another few feet. Effort is in proportion to the weight of the rock, and how far you want to move it. Also, uphill is harder than downhill. Also, heavy things fall harder than light things. You know that if you stand under one and it falls on your head.
An immovable rod is as difficult to shift as a 4 ton rock but it doesn't fall down at all. This is easy to understand. It just doesn't like to be moved. It's stubborn.
Here endeth the physics lesson.