Mechanics: 1-Dimensional Kinematics
1-D Kinematics: Audio Guided Solution
Problem 1:
In
the 2008 Olympics, Jamaican sprinter Usain Bolt shocked the world as he
ran the 100-meter dash in 9.69 seconds. Determine Usain's
average
speed for the race.
- Read the problem carefully and develop a mental picture of the physical situation. If necessary, sketch a simple diagram of the physical situation to help you visualize it.
- Identify the known and unknown quantities in an organized manner. Equate given values to the symbols used to represent the corresponding quantity - e.g., vo = 0 m/s; a = 4.2 m/s/s; vf = 22.9 m/s; d = ???.
- Use physics formulas and conceptual reasoning to plot a strategy for solving for the unknown quantity.
- Identify the appropriate formula(s) to use.
- Perform substitutions and algebraic manipulations in order to solve for the unknown quantity.
Get more information on the topic of Kinematics at The Physics Classroom Tutorial.
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