Physics 1028A/B Lecture Notes - Lecture 9: Massachusetts Route 2, Resultant Force
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16 Oct 2018
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Dynamics: the study of forces and their effects on the motion of objects. Normal force: the force perpendicular to surfaces in contact with each other. Force of friction: the force parallel to surfaces in contact with each other, due to forces between molecules in the surfaces. Static friction: the friction force exerted between surfaces that are not moving relative to each other. Kinetic friction: the friction force exerted between surfaces moving relative to each other. Tension: a force exerted on objects - acting away from the object being considered - by pulling it. Contact forces: forces that, in order to be exerted, require contact between objects e. g. friction, normal and tension. Action-at-a-distance forces: forces that do not require contact between objects in order to be exerted e. g. gravity, electrostatic and magnetic. Free-body diagram (fbd): a diagram in which only the forces acting on a particular object are shown.
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