# Mo8on in two dimensions under the force of gravity

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Unformatted text preview: velocity is along a line that is tangent to the path of the par8cle and in the direc8on of mo8on •  SI unit: meter per second (m/s) Accelera8on •  The average accelera8on is deﬁned as the rate at which the velocity changes •  The instantaneous accelera8on is the limit of the average accelera8on as Δt approaches zero •  SI unit: meter per second squared (m/s²) Accelera8on due to change in velocity •  The magnitude of the velocity (the speed) may change with 8me •  The direc8on of the velocity may change with 8me, even if the magnitude is constant example: circular mo8on •  Both the magnitude and the direc8on may change with 8me Projec8le Mo8on Projec8le Mo8on •  Mo8on in two dimensions under the force of gravity •  Ignoring the air fric8on and the rota8on of the earth, the projec8le path is a parabola. Projec8le Mo8on •  The x- and y- direc8ons of mo8on are completely independent of each other •  The x- direc8on is uniform mo8on –  ax = 0 •  The y- direc8on is free fall –  ay = - g •  T...
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## This document was uploaded on 01/14/2014.

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