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Δ velocity. total distance. total distance. Δ distance. Δ time. total time. total time. Δ time. total displacement. total displacement. avg. velocity = v =. total time. total time. Δ displacement. Δ time. v f – v i. or a =. t. 1 st , some review….
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Δvelocity total distance total distance Δdistance Δtime total time total time Δtime total displacement total displacement avg. velocity = v = total time total time Δdisplacement Δtime vf – vi or a = t 1st, some review… How far an object travels (a scalar qty.; it only has size) avg. speed = How far an object gets from its starting point and in what direction(a vector qty.; it has size & direction) instantaneous speed = instantaneous velocity = v = • 2 things: • We will work mostly with velocities, not speeds. • + will mean forward or up,- will mean backward or down. acceleration = a = …since time almost always starts at zero. Also, underline all the vector quantities above.
So now, your new friends, when acceleration is constant or zero…(and d = displacement & v = velocity) d = t d = t d = vit + at2 or 1) DVT(Using algebra onavg. velocity…) 2) VAT(Using algebra onthe def. of acceleration…) vf = vi + at at2 Then, using substitution…3) DAT Then, using substitution again…4) VAD vf2 = vi2 + 2ad So what’s up with the names? THEY COME FROM IGNORING vi IN EACH EQ.! And why am I naming them in the first place?
