PHYSICS 207 Lecture Notes - Lecture 2: One Direction
18 Sep 2016
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Motion along a line, either x or y axis, with the position x(t) is defined as motion with constant acceleration due to the equations that define v(t) and a(t). Useful equations for solving problems involving one-dimensional motion include: x(t) = x0 + v0t + at2, v(t) = v0 + at. 2: 2 a (x-x0) = v2-v0, v = v0 + a((tf - ti) / 2) The last equation is used to calculate the instantaneous velocity halfway between t i and tf. The first step to solving a physics word problem is to pose the problem mathematically. The next step is to solve for variables that are needed to solve the whole problem. : we want t so we solve for t by setting x=0. 0 = 100m 4. 9m/s2*t2 t2 = 100m/4. 9 m/s2 = 4. 518 s. Setting v0 equal to 0 and then solving for v.
