Mechanics: 1-Dimensional Kinematics

1-Dimensional Kinematics: Audio Guided Solution

Extra Problem 8:

In order to pass a physical education class at a university, a student must run 1 mile in 12.0 minutes. After running for 10.0 minutes at a constant pace, she still has 581 yds to go. Assuming that she accelerates uniformly over the remainder of the run, what acceleration (in m/s/s) would she need to pass the test? (GIVEN: 1 mi = 1609 m; 3.28 ft = 1.00 m).

Audio Guided Solution

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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 iteself. They 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 = ???.).
• ...plots a strategy for solving for the unknown quantity; the strategy will typically center around the use of physics equations be heavily dependent upon an understaning 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.