100917-opp - 9/17/10 Physics 121 1 9/17/10 Physics 121 2...

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Unformatted text preview: 9/17/10 Physics 121 1 9/17/10 Physics 121 2 slopes areas 9/17/10 Physics 121 x v= t x=v t 7 change in velocity <a>= time it took to make the change v <a>= t 9/17/10 Physics 121 8 9/17/10 Physics 121 9 dv a (t ) = dt v (t + a (t ) = 9/17/10 t 2 ) v (t t Physics 121 t 2) 10 a (m/s2) v (m/s) dv t (sec) a dt dv a (t ) = dt v(t + a (t ) = 9/17/10 t 2 ) v(t t Physics 121 t 2 t (sec) ) 11 2 a (m/s) v (m/s) a dv dt sum (“ ”) in the changes in velocity over many small time9intervals. /17/10 t (sec) dt dv = a (t ) dt v= t (sec) change in velocity over a small time interval dv = a (t ) dt Physics 121 12 y r1 r r2 r2 = r1 + r r = r2 r1 x 9/17/10 Physics 121 15 y t1 r1 t2 r1 r2 t3 r2 r 3 r1 r2 r3 t4 r4 Position x r1 r1/ t = v1 r2 r3 v2 v1 v2 v1/ t = a1 v1 r2/ t = v2 r3/9/17/10 v3 t= r3 Velocity v2/ t = a2 Physics 121 Acceleration 16 ˆ ˆ r = xi r v= t v a= t 9/17/10 Physics 121 (where x is a signed length) dr v= dt dv a= dt 17 9/17/10 Physics 121 18 ...
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This note was uploaded on 12/28/2011 for the course PHYSICS 121 taught by Professor Shawhan during the Spring '10 term at Maryland.

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