Elements of Physics

Purchase of this book includes free trial access to www.million-books.com where you can read more than a million books for free. This is an OCR edition with typos. Excerpt from book: PART II. The Fundamental Thuths Used To Explain The PeculiariTies Of State Ahd Motion Which Depend On The Solid Form Of Bodies: A Department Commonly Called MeChanics. ANALYSIS OT THE CHAPTER. cJ force which moves part of a solid body, must affect the whole or break off the part. If the force be directed...
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Purchase of this book includes free trial access to www.million-books.com where you can read more than a million books for free. This is an OCR edition with typos. Excerpt from book: PART II. The Fundamental Thuths Used To Explain The PeculiariTies Of State Ahd Motion Which Depend On The Solid Form Of Bodies: A Department Commonly Called MeChanics. ANALYSIS OT THE CHAPTER. cJ force which moves part of a solid body, must affect the whole or break off the part. If the force be directed towards a central point in the mass, it will affect the whole equally, whether simply to support the mats, or to move it, or to stop it when in motion. The point, according to circumstances, it (ailed the CenTre OF GRAVITY, Or INERTIA, Or OT ACTION. In solid bodies moeing about an axit, as exemplified in a wheel or weighing beam, the various parts are describing circles or moving through. spates, which are greater in proportion to their respective distances from the centre of motion. ffenee forces differing from tach other as to speed, may itill, through a solid medium, be brought exactly to co-operate or to oppose each other; and a slow force will counterbalance or be equivalent to a quicker one, provided that it be more intense inproportitn at it is slower. The Simple Machines called l.KVEH, WHEEL AND AXLE, FULLY, INCLINED PLANE, WEDGE, SCREW, fft. are so many arrangements of solid parts, by which forces of different velocities and intensities may be thus connected or opposed, or conveniently substituted for each other. y solid connecting parts also the direction of any existing motion nr force may be changed, as when the straight motion of running water is converted into the rotatory motion of a water wheel, t(e. Hence arises an endless variety o/' ComPlex Machines. in all machines it is important ta dimmish the resistance among moving parts which arises from Friction, and in solid structures generally, the forms and positions of parts must be adjust...