Lecture 4 Notes (PDF) - SFSU Physics & Astronomy

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Falling Objects in Air An object falling in air is subject to air resistance (and thus is not freely falling). Amount of air resistance depends on shape & size. 11 Free Fall --Object Dropped • Initial velocity is zero • Frame: let up be positive y • Use the kinematic equations – Generally use y instead of x since vertical v o = 0 1 2 y = at a = - g 2 a = −9.8m s 2 y = −(4.9m / s 2 ) t 2 a x 12
v = - y = y = - v = - y = - Free fall from rest: y v= - y = - v= - y = - 13 Free Fall --Object Thrown Downward • a = - g – With upward being positive, acceleration will be negative, a = -9.8 m/s² • Initial velocity ≠ 0 – With upward being positive, initial velocity will be negative y v 0 x a 14
Page 1 and 2: Physics 111.01 Lecture 4 (Walker: 2
Page 3 and 4: Solving the problem • What is kno
Page 5: Free Fall • Objects moving under
Page 9 and 10: Graphical example: A ball is thrown
Page 11 and 12: Example: The Flying Cap Upon gradua
Page 13 and 14: Vector Notation • When handwritte
Page 15: More About Components of a Vector

Lecture 4 Notes (PDF) - SFSU Physics & Astronomy

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