Mechanics: 1-Dimensional Kinematics
1-Dimensional Kinematics: Audio Guided Solution
Problem Set K18, Question 7:
(Referring to the previous problem.) A 56-kg hockey player is standing on a frozen pond. A player on the opposing team passes by with the puck, moving at 13.5 m/s skates. After 3.37 s delay, the first player makes up her mind to chase her opponent. She accelerates uniformly at 5.69 m/s/s in an effort to catch up. What distance will the first player (the one that is accelerating) move before catching up with the opposing player? (Assume that the player with the puck continues in motion at a constant speed.)
Audio Guided Solution
Habits of an Effective Problem Solver
An effective problem solver by habit approaches a physics problem in a manner that reflects a collection of disciplined habits. An effective problem-solver...
- ...reads the problem carefully and develops a mental picture of the physical situation. If needed, they sketch a simple diagram of the physical situation to help visualize it.
- ...identifies the known and unknown quantities in an organized manner, often times recording them on the diagram itself. They equate given values to the symbols used to represent the corresponding quantites (e.g., vo = 0 m/s; a = 4.2 m/s/s; vf = 22.9 m/s; d = ???.).
- ...plots a strategy for solving for the unknown quantity; the strategy will typically center around the use of physics equations and be heavily dependent upon an understanding of physics principles.
- ...identifies the appropriate formula(s) to use, often times writing them down. Where needed, they perform the needed conversion of quantities into the proper unit.
- ...performs substitutions and algebraic manipulations in order to solve for the unknown quantity.
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