PHYSICS 10 Lecture Notes - Lecture 2: Vise, Protractor
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Lecture 2- 1 and 2 directional motion: a ball is thrown upward with velocity 5 m/s. Choose an axis: y (sub for d- position) Choose a sign of free-fall (g- sub for acceleration a): going up = g is negative, going down = g is positive (g=9. 8 or 10 m/s2) 0 = vi gt vi = gt t = : how long will it take for it to come back to the ground? y = 0. 0 = vi = t = t = In 2 directional motion, there are vectors that have both magnitude and direction (ex. The horizontal and vertical components of 2-dimensional motion are independent of each other. Any motion in the horizontal direction does not affect motion in the vertical direction, and vise versa: an airplane moves north with speed 300 km/h. There is a wind from the west that has speed 40 km/h.
