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Unformatted text preview: s Laws • Newton’s three laws of moLon as well as Newton’s law of universal gravity are the building blocks of Classical Mechanics Forces • Force is a vector • contact force: when two objects are in physical contact • ﬁeld force: when two objects are away from each other • net force on an object: The vector sum of all possible external forces on an object. • External force is a result of interacLon between the object and its environment Examples of diﬀerent forces Four fundamental forces in nature Classical Physics Strong nuclear force (Strongest force) Binding protons together in nucleus ElectromagneLc force Weak nuclear force radioacLve processes Sun’s energy output GravitaLonal force (Weakest force) Newton’s First Law An object moves with a velocity that is constant in magnitude and direcLon, unless acted on by a nonzero net force This means if an object’s acceleraLon a=0 then the net force acLng on it is zero F=0 InerLa and Mass • InerLa is the tendency of an object to conLnue in its original moLon in the absence of a force. • Mass is a scalar quanLty that is a measure of the...
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This document was uploaded on 01/14/2014.
- Winter '14