![]() ![]() ![]() ![]() Before each pair of readings is taken, the liquid should be allowed to settle so that the heat caused by the compressions is dissipated. The trapped air is then compressed progressively, with pressure (p) and volume (v) readings taken at each stage. The vertical tube is part – filled with the colored liquid and sealed. Slotted weights and weight hangers are made of brass.Īpparatus for the recording of pressure verses volumes and for investigating boyle’s law. Rods, pulley and clamps are made of either plated metal or polished.1 tommy bar to tighten the vertical rods and instruction manual.15 siotted weights (2 each of 10g, 20g, and 50g, 4 each of 100g and.7 weight hangers (5 of 50g and 1 each of 10g and 20g).Helps understand the concepts of the mechanical advantage, the efficiency of fixed and moveable pulleys, etc.Ĭomprised of a rectangular laminated wooden base about (I x d), 20 x 82cm which supports two threaded rods measuring approximately 12.5mm x 81cm in metal flanges and is fitted with a capstan and a screw eye.Įight clamps (hook collars) are provided for suspending pulleys and cords on an adjustible cross rod approximately 12.5mm x 81cm, held by right-angle clamps. When the rug is thrown spinning into the air, the dot orbits around the COM (unless it has been stuck at the COM location).For demonstrating and performing quantitative experiments on fixed and moveable pulleys, trains of fixed and moveable pulleys, the wheel and axle and the capstan etc. A large movable dot (made out of Velcro™ and fluorescent tape) can be stuck anywhere on the rug lamina. The U-shaped object's COM is in the center of the U, not within the object itself. map is somewhere in Kansas (very likely where Dorothy and Toto reside). The plumb bob is any suitable weight on a string with a loop at the other end for quick hanging and removal from the anchor rod. The various suspension "points" on the lamina are actually holes, any of which are slipped over the anchor rod of the suspension assembly. The suspension mechanism is nothing more than a simple assembly of standard lab clamps and rods attached to the lecture table. If reasonable care is exercised, the chalk lines intersect at a single point - the COM. This is repeated from one or two other suspension points. A chalk line is drawn along the vertical plumb line. The lamina is hung from any of its suspension points with the plumb bob hanging from the same. The center-of-mass of an irregular shaped lamina is found by supporting it from various points. glued onto a 1/2" plywood board, (3) a U-shaped object made out of 3/16" plywood, (4) an asymmetric polygon shaped polystyrene sheet, and (5) an irregular shaped piece of rug which can be safely thrown, spinning in the air, and caught. They are (1) an amoeba shaped piece of masonite pegboard, (2) a cut-out map of the U.S. We have several irregular lamina to suspend and/or throw in the air. When an irregular shape is thrown into the air, it is seen to rotate about its marked center of gravity or center of mass (COM). The center of gravity fixed in (or outside) the object always orients itself with minimum potential energy on a vertical line below the support point. ![]() Center of gravity - center of mass - equilibrium ![]()
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