Basic Physics - Laws, Theories and Definitions

An Historical Timeline of Important Inventions, Ideas and events

Basic Physics - Laws, Theories and Definitions

Newton's 3 Laws of Motion (1) Law 1: Every body continues in its state of rest, or of uniform motion in a right line, unless it is compelled to change that state by forces impressed upon it.

Law 2: The change of motion is proportional to the motive force impressed; and is made in the direction of the right line in which that force is impressed.

Law 3: To every action there is always opposed an equal reaction: or, the mutual actions of two bodies upon each other are always equal, and directed to contrary parts.

Definitions (2) Speed = distance traveled / time required

Velocity = speed and direction

Acceleration = change in velocity

SOURCES (1) Principia Vol. 1, Sir Isaac Newton, University of California Press, 1962, p. 13.

(2) The Physical Universe, Konrad B. Krauskopf and Arthur Beiser, McGraw-Hill, Inc., 1967, p. 16-18.

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