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@ -157,7 +157,8 @@ en el sentido del movimiento.<br> |
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et dirigé dans le sens du mouvement.<br> |
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et dirigé dans le sens du mouvement.<br> |
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[EN] with $`\overrightarrow{e_T}`$ the unit vector tangent to the trajectory and |
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[EN] with $`\overrightarrow{e_T}`$ the unit vector tangent to the trajectory and |
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oriented in the direction of movement.<br> |
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oriented in the direction of movement.<br> |
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<br>$`\overrightarrow{e_T}=\dfrac{\overrightarrow{l}}{||\overrightarrow{l}||}. |
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<br>$`\overrightarrow{e_T}=\dfrac{\overrightarrow{dl}}{||\overrightarrow{dl}||} |
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=\dfrac{\overrightarrow{dr}}{||\overrightarrow{dr}||}`$. |
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<!--$`\overrightarrow{e_T} |
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<!--$`\overrightarrow{e_T} |
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=\dfrac{\dfrac{\partial \overrightarrow{OM}}{\partial x}}{\left| \left| |
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=\dfrac{\dfrac{\partial \overrightarrow{OM}}{\partial x}}{\left| \left| |
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