...motion, is called Force. 6. A body when acted upon by a single force, moves in a straight line ; and will continue to move in the same direction, and with the same velocity, until acted upon by some other force. Fig. 20. * From the I,atin words centrum, meaning the centre,...

...'A body,' says Mr. Kiddle, (p. 28) 'when acted on by a single force, moves in a straight line; and will continue to move in the same direction, and -with the same velocity, until acted upon by some other force.' Now this is not true. For if the 'single force,' which acts...

...it has lost all of its energy; if it meets no resistance, or is acted on by no other force, it must continue to move in the same direction, and with the same velocity forever. 45. Force not Affected by the State of Rest or Motion. — A force acting on a body will produce...

...follow the development of its various branches. CHAPTEE IL MECHANICS. 6. Principle of Inertia. — The fundamental principle of physics is the inertia of...the very obscure subject of the intimate nature of forces — without seeking to know whether they form an essential part of bodies or have a separate...

...state, iuhether of rest or motion. That is to say, if it be at rest it will remain at rest; if it lie in motion it will continue to move in the same direction...the very obscure subject of the intimate nature of forces — without seeking to know whether they form an essential part of bodies or have a separate...

...Pestles, stamps, and fly wheels are other applications of inertia. It may be thus expressed: "If a body be at rest, it will remain at rest ; if it be in motion,...in the same direction and with the same velocity." 25. Divisibility is the property which allows a body to be separated into parts. By mechanical and...

...change its state, whether of motion or rest.* If a ITody is at rest, it will remain at rest ; and if in motion, it will continue to move in the same direction, and with the same velocity, until acted upon by some external force. This is the substance of Newton's first law of motion. The...

...new, is the same in substance as that given by nearly all reputable modern writers. We give a few: "The principle of inertia is an abstract principle...in the same direction and with the same velocity." — DESCHANEL. - ' Inertia is a purely negative property of matter ; it is the incapability of matter...

...enunciates that, if a body be at rest, it will remain so unless acted on by some external force ; or, if it be in motion, it will continue to move in the same straight line and at a uniform velocity unless it is acted on by some external force. Practically every...

...are examples of natural "law : " (i) If a body be started in motion, and if no force acts upon it, it will continue to move in the same direction and with the same velocity. (2) Change of motion is proportional to the acting force, and takes place in the direction of the straight...