ASTRON 103 Chapter 14: Textbook Notes - 14
5 Oct 2016
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Unit 14: astronomical motion: inertia, mass, and force. Isaac newton (1642-1727: english physicist, mathematician, & astronomer who pioneered modern studies of motion, optics, gravity, & calculus, & showed how to apply them to the. Ball speed up down slope & slows down up slope. Hypothesized that if a ball rolled on a flat surface & there was no friction, its speed would neither increase nor decrease but remain constant. In absence of any force pushing or pulling, inertia keeps an object already in motion moving at a fixed speed : examples from everyday. Grocery bags move forward when one hits the breaks. People move backwards on a bus when it starts moving. Mass: amount of matter (or material) an object contains. Measurement of inertia: not the same as weight, generally measured in kg. A body maintains a constant velocity unless forces act on it . Velocity: physical quantity that indicates both speed & direction.
