* Your assessment is very important for improving the workof artificial intelligence, which forms the content of this project
Download Physics 111 - Lecture 6 Dynamics, Newton’s Laws (Summary)
Survey
Document related concepts
Jerk (physics) wikipedia , lookup
Brownian motion wikipedia , lookup
N-body problem wikipedia , lookup
Inertial frame of reference wikipedia , lookup
Center of mass wikipedia , lookup
Fictitious force wikipedia , lookup
Hunting oscillation wikipedia , lookup
Mass versus weight wikipedia , lookup
Modified Newtonian dynamics wikipedia , lookup
Seismometer wikipedia , lookup
Classical mechanics wikipedia , lookup
Centrifugal force wikipedia , lookup
Newton's theorem of revolving orbits wikipedia , lookup
Equations of motion wikipedia , lookup
Centripetal force wikipedia , lookup
Classical central-force problem wikipedia , lookup
Transcript
Physics 111 - Lecture 6 Dynamics, Newton’s Laws (Summary) • Dynamics deals with why objects move as they do • The Concept of FORCE • Forces are Vectors • Contact Forces: push, pull • Forces at a distance: gravity, electromagetic • The NET FORCE on a body is the vector sum of all forces acting on the body r F1 r r r r r Fnet = ∑ Fi = F1 + F2 + F3 + L r Fnet i r F2 • No net force is required to keep a body in motion with constant velocity (Galileo) • There is no difference between the state of rest and the state of uniform motion Sir Issac Newton 1643-1727 Newton’s First Law of Motion Every body continues in a state of rest or uniform velocity unless it is compelled to change that state by a net force acting upon it. • Inertia of an object is its tendency to maintain its present state of motion. Mass is a measure of Inertia. Newton’s Second Law of Motion Force is equal to mass time acceleration. r r Fnet = m a F1x + F2x + L = m a x F1y + F2y + L = m a y F1z + F2z + L = m a z