22 lines
1.8 KiB
Markdown
22 lines
1.8 KiB
Markdown
[[Linear Momentum]]
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# Summary
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* Net force equals $\vec F_{net}=\frac{\Delta \vec p}{\Delta t}$
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* Impulse is average force over time interval: $\vec J = \vec F_{avg}\Delta t$
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* Impulse-momentum theory is impulse = change in momentum: $$\vec J=\Delta \vec p = \vec p-\vec p_0$$
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* Integral of a force vs time graph equals impulse, slope of momentum vs time graph = net force
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* Impulse units are N * s (kg * m/s)
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* When mass is constant F=ma comes from Impulse-Momentum theory
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|Term|Definition|
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|axis of rotation|The fixed line about which a system rotates.|
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|force component perpendicular|The portion of an applied force that acts at a right angle to the position vector from the axis of rotation.|
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|force diagram|A diagram used to represent and analyze the forces and torques exerted on a rigid system, showing the magnitude, direction, and point of application of each force relative to the axis of rotation.|
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|free-body diagram|A visual representation that shows all forces exerted on an object or system, with each force drawn as a vector originating from the object's center of mass.|
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|lever arm|The perpendicular distance from the axis of rotation to the line of action of an applied force.|
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|line of action|The straight line along which a force acts, extending infinitely in both directions.|
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|perpendicular force|The component of a force that is perpendicular to the position vector, which directly contributes to torque production.|
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|position vector|A vector drawn from the axis of rotation to the point where a force is applied on a rigid system.|
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|rigid system|A system that holds its shape but in which different points on the system move in different directions during rotation.|
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|torque|A measure of the rotational effect of a force on a rigid system, calculated as the product of the force and its perpendicular distance from the axis of rotation.| |