8th Grade Science/Section 1: Newton's First Law

From Wikibooks, open books for an open world
Jump to navigation Jump to search
The ball keep moving at straight line once it is detached from the rope

Newton’s first law states that, if a body is at rest or moving at a constant speed in a straight line, it will remain at rest or keep moving in a straight line at constant speed unless it is acted upon by a force. This postulate is known as the law of inertia.