ac:biomech_intro
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ac:biomech_intro [2019/09/22 01:07] admin created |
ac:biomech_intro [2020/03/24 02:34] (current) |
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| === Chapter 1 === | === Chapter 1 === | ||
| - | Biomechanics is a scientific discipline which studies biological systems, such | + | Biomechanics is a scientific discipline which studies |
| - | as the human body, by the methods of mechanical engineering. Since gait is a | + | as the human body, by the //methods of mechanical engineering//. Since gait is a |
| mechanical process which is performed by a biological system, it is | mechanical process which is performed by a biological system, it is | ||
| appropriate to study it in this way. | appropriate to study it in this way. | ||
| Line 13: | Line 13: | ||
| Force is a vector | Force is a vector | ||
| + | |||
| The whole science of mechanical engineering is based on the three laws of | The whole science of mechanical engineering is based on the three laws of | ||
| force propounded by Sir Isaac Newton, which may be paraphrased as follows. | force propounded by Sir Isaac Newton, which may be paraphrased as follows. | ||
| - | Newton’s first law: A body will continue in a state of rest, or of uniform | + | **Newton’s first law:** A body will continue in a state of rest, or of uniform |
| motion in a straight line, unless it is acted upon by an external force. | motion in a straight line, unless it is acted upon by an external force. | ||
| - | Newton’s second law: An external force will cause a body to accelerate in | + | **Newton’s second law:** An external force will cause a body to accelerate in |
| the direction of the force. The acceleration (a) is equal to the size of the force | the direction of the force. The acceleration (a) is equal to the size of the force | ||
| (F) divided by the mass (m) of the object, as in the equation: | (F) divided by the mass (m) of the object, as in the equation: | ||
| a = F/m | a = F/m | ||
| - | Newton’s third law: To every action there is a reaction, which is equal in | + | **Newton’s third law:** To every action there is a reaction, which is equal in |
| magnitude and opposite in direction. | magnitude and opposite in direction. | ||
ac/biomech_intro.1569114424.txt.gz · Last modified: 2020/03/24 02:34 (external edit)
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