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Physics : To find the center of mass of various shapes.

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Introduction

PHYSICS LAB CENTER OF MASS Aim: To find the center of mass of various shapes. Shapes: Center of Mass: Towards the middle, a little eastwards. Where all edges are furthest possible. Center of Gravity: In the middle of the width of the shape, since it's symmetrical. Towards the lower part of it vertically. Center of Mass: Totally symmetrical shape, therefore center of mass is exactly in the center. Center of Mass: Furthest possible away from each edge, towards the middle of the shape. Conclusion: All the shapes have the center of mass towards the middle. They all have the center of mass the furthest from each edge as possible. The shapes that are symmetrical have the center of mass in the middle, whereas the square shape has it exactly in its center, since its symmetrical anyway you look at it. ...read more.

Middle

Since the gravity is focused on the center of mass, this means that all of the forces acting upon the body cancel out. Thus creating equilibrium, so if you put your thumb in the center of mass of any shape, the shape is supposed to stay still. The center of mass of an object depends on its shape. The stability of an object depends on its center of mass. Therefore the stability is dependent on shape. If the shape is supported in this point, forces will balance and give stability to the object. This means that the center of gravity determines the place where the object reaches balanced forces, therefore becoming stable. Evaluation: This experiment is done with very simple equipment, this is why it has to be very carefully carried out. ...read more.

Conclusion

Another thing that may have affected results is the fact that we placed the string apart from the shape and had to push it backwards to measure the line, this could have easily caused an error in measurement. The shape has to be very close to the string to produce more accurate results. Since the shape may have the center of mass outside the paper itself, you have to make sure that you leave not too many empty spaces near the center, and try to make wide shapes rather than thin ones. Another thing needed for this experiment is patience, since the shape may take some time to settle and stop moving. The last thing that I would recommend to get better results is that the more measurements you take from the string and the object the better, since you have more points of reference, which is always a good thing. Isn't it? ...read more.

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