Q.4) A machine part is subjected to four forces and three couple moments as shown. The part is to be held in place by a single rivet that can only resist a force but not a couple (simplest resultant). Determine the location of the rivet hole if it is placed somewhere along the horizontal line between A and B. 750 N 325 N 400 N 12 5 50 mm 40 N.m 25 mm A 25 mm 200 mm 150 mm 20° 600 N 50 N·m 300 mm 40 N.m B 25 mm 75 mm 75 mm 25 mm

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Length and Length related Variables

Length can de defined as the measurement or extent of physical quantities or objects from one terminal to another terminal. Stone age humans used finger length, step length, and so on to measure the size or displacement of an object. Nowadays, depending on how precise the measurement requires to be and the object’s size is measured, we use measuring devices for measurements like rulers and steel tape. Most people have used a ruler or tape measure to measure a particular distance or the size of an object. For more precise measurements of tiny objects, the development of measurement tools such as the Vernier caliper, which permits us to measure dimensions within 1/1000 of an inch. In the last few decades, electronic distance measuring instruments (EDMI) have been implemented that permit us to measure distances from a few feet to many miles with reasonable accuracy.