Mechanics: Momentum and Collisions
Momentum and Collisions: Audio Guided Solution
Extra Problem 11:
The bird perched on the swing in figure 6.22 has a mass of 52.3 g and the base of the swing has a mass of 181 g . Assume that the swing and the bird are originally at rest and that the bird then takes off in a horizontal direction at 2.37 m/s. If the base can swing freely (i.e., without friction) around the pivot, how high (in cm) will the base of the swing rise above its original level?
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...
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...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.
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...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 = ???.).
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...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.
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...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.
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...performs substitutions and algebraic manipulations in order to solve for the unknown quantity.