By Clifford Newton. Mills

ISBN-10: 1152039687

ISBN-13: 9781152039681

Writer: manhattan, D. Van Nostrand corporation ebook date: 1916 topics: Mechanics Notes: this can be an OCR reprint. there is typos or lacking textual content. There are not any illustrations or indexes. should you purchase the overall Books version of this booklet you get loose trial entry to Million-Books.com the place you could choose from greater than one million books at no cost. you may as well preview the ebook there.

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Is the in weight falls from the a distance of 40 feet. momentum? Compare the amounts of momentum in a pillow of 20 pounds which has fallen vertically i foot and an ounce bullet moving at 200 feet per second. 6. What force will in one minute give a weight of a velocity of 10 miles per hour? i ton KINETICS How 7. 33 long must a force of 20 pounds act on a weight of 512 tons to give it a velocity of i foot per second? 8. The moving force is 3 pounds and the weight acted Find the distance described in ten 10 pounds.

Motion on a Smooth Inclined Plane. strike the first vessel 19. (Fig. 10) be the vertical Let AB sec- smooth plane maka ing given angle 6 with the horizon tal. Let P be the tion of a particle which moves on the plane. The downward tion of the moving due to gravity its accelera- components, and along the plane for particle Resolve this acceleration into is g. it is evident that the acceleration g sin is a falling body, we 0, Hence in the formulas need only substitute g sin d iorg, EXAMPLES V 1. Show that the velocity acquired by a body in slid- ing from rest down a smooth plane of length k is the same as that acquired by a body in falling freely through the which the body is above the horizontal.

6] o / _vi^ ~ Sin . g is / (tt — 6. Then 2 — 2^) \ o ~ vi"^ g for d . sin 2S g which shows that the same horizontal range and — since , o Suppose the angle of projection -p be easily seen to is given 6. 2 All of the preceding discussion has been entirely theoretical, and of no practical use, since the resist- ance of the air plays a very important part in the study of projectiles. EXAMPLES VI 1. A bullet is projected with a velocity of 500 feet per second at an angle of 40° with the horizontal.

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