The book Modern Carpentry; a Practical Manual.. 2 was written by author Hodgson, Frederick Thomas, 1836-1919 Here you can read free online of Modern Carpentry; a Practical Manual.. 2 book, rate and share your impressions in comments. If you don't know what to write, just answer the question: Why is Modern Carpentry; a Practical Manual.. 2 a good or bad book?
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5) represent in magnitude a force of 10 lbs. acting at the point A in the direction indicated by the arrow, and A C a force of 6 lbs. acting MECHANICS OP CAEPENTRY 311 at right angles to AB. Complete the parallelogram ACDB. Then the length of the diagonal AD rep- resents the magnitude of the resultant force, and the direction in which it acts will be from the point A, as shown by the arrow. It must be understood clearly that a resultant is a force which can take the place of, and will produce t...he same effect as, two or more forces. To maintain equilibrium, the resultant force must be counterbal- anced by an equal force acting in the opposite direc- tion. The force so acting is called the equilibrant. Fig. 6. Example 6. Figs. 6 and 7 show the magnitude and direction of the resultant force when forces of 9 and 6 lbs. respectively act at angles of (a) 120°, (b) 45°. The simple apparatus shown in Fig. 8 clearly illus- trates the principle of the parallelogram of forces. On a vertical board are fixed two small pulleys by means of screws, so that they revolve with as little friction as possible.
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