![]() Due to the large amount of error in that trial it was not included in the average which is -32. Our first trial had the highest perfect of error with -100 net torque. If in balance, the value of the net torque should equal zero. We added 1 gram of weight to the left of the system which caused the entire system to go out of equilibrium. ![]() Sensitivity of the balance: Change in Massĭue to the high sensitivity of the system, the smallest amount of weight will cause the system to go out of balance. This force also has a horizontal direction.Ī being the mass added, B being the original mass.Ī being the distance moved, B being the original distance.į being the force, and D being the distance.ĭata Analysis: See attached analysis pages Now, if some mass were added to one side of the meter stick then the center of mass would fluctuate to compensate for this new force (magnitude) in the system. If the meter stick is held directly in the middle assuming the mass is evenly distributed without, the meter stick should hang horizontally at 0. When examining the torque of a body, it is important to examine the point on an object that a force is operating on. By taking the amount added to one side, dividing it by that sides original weight, and multiplying it by one hundred will produce the percentage change in mass. 1 gram added to either of the sides can disrupt it. Due to the high sensitivity of the system, a very minimal weight of even. This measures the accuracy of the system. The sensitivity of the system can be tested by balancing the meter stick and adding weight to one side until the system falls out of equilibrium. Do this until the end of the meter stick is reached. Add 20 grams to the left weight hanger and reposition the right hanger. ![]() Each weight hanger has a mass of 50 grams. Record the values that the weights are hanging from when the stick has reached equilibrium. Holding that in place, attach a second weight to the right of the center of the meter stick. When the meter stick is balanced on the weight hanger, suspend a weight on the hanger 10 cm to the left from center. However, due to the meter sticks mass being unevenly distributed, not all meter sticks will balance at 50 cm. The center of gravity for the meter stick will be at the center of the hanger. The meter stick is then balanced on the meter stick hanger. The mass of the meter stick, paper clips, and weights were recorded using an electronic scale with ☐.1 gram resolution. The purpose of this lab is to apply torques to a body and when that body is at static equilibrium the net torque should equal zero.Įxperimental Methodology Overview: Theory, Measurements and Relevant Formulas When an object is at rest it is said to be in static equilibrium. The contrary applies to clockwise rotation. When a torque is applied to a body and the rotation occurs in the counterclockwise direction the angular acceleration is positive. Check out the following video to learn how to experimentally find the center of gravity (mass) of an irregular object.Torque can be applied to a body and tends to change the rotational motion either counterclockwise (CCW) or clockwise. Everyday objects, like humans, are small enough that gravity acts uniformly on all parts of the object and the center of gravity and the center of mass are essentially the same location. If we averaged the location of all the equal chunks of mass that would be the center of mass. If we average the locations of all those equal tiny forces, the resulting location would be the center of gravity. If we add up all those tiny forces we get your total weight. If we break up your body into many many small chunks of equal mass we could calculate the tiny force of gravity on each one. Do you feel it pulling on just your leg, or your arm, or what? Actually, the force of gravity acts on all of your mass in the same way, according to Newton's Universal Law of Gravitation down to every single molecule and atom. We already know that the force of gravity is what gives an object weight, but what is the center of gravity? Think about which body part you feel gravity pulling on. ![]() You may have heard the term center of gravity in reference to balance and you might intuitively know that a toddler’s big head raises their center of gravity, which makes them less stable than adults. 38 Center of Gravity Finding the Center of Gravity
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