100927-opp - 9/27/10 Physics 121 1 9/27/10 Physics 121 2...

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Unformatted text preview: 9/27/10 Physics 121 1 9/27/10 Physics 121 2 “Net pForce “ = vector sum of all the pForces acting on the object. F net a= m FA 9/24/10 Physics 121 B = FB A 3 F( object causing force) 9/27/10 (object feeling force) Physics 121 4 9/27/10 Physics 121 6 9/27/10 Physics 121 7 9/27/10 W a= m Physics 121 8 W a= =g m W = mg 9/27/10 Physics 121 11 9/27/10 Physics 121 12 g WE m g 9/27/10 = mg 9.8 N/kg Physics 121 What object causes W? Why N/kg instead of m/s2?3 1 A pForce is what two objects do to each other when they touch that can change each others’ velocities. Measured by the stretch of a spring. F net a= m FA 9/27/10 Physics 121 B = FB A 14 a=F 9/27/10 net = m WE m m Physics 121 mg = =g m 15 9/27/10 Physics 121 16 y F net WE m mg a= = = =g m m m v y v= a =g= t t 9/27/10 Physics 121 17 g= v t v= vi = v0 vf = 0 g= y t yi = 0 yf = h vf vi tf ti v= ti = 0 tf = T yf yi tf ti v0 h v= T T vi + v f v0 v= = 2 2 v0 v0 h T= = g 2T g= 9/27/10 Physics 121 2 v0 1 2 h = 1 v0T = = 2 gT 2 2g 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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100927-opp - 9/27/10 Physics 121 1 9/27/10 Physics 121 2...

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