Mechanics: Vectors and Forces in 2-D
Vectors and Forces in 2-D: Audio Guided Solution
Extra Problem 19:
In the Eat at Ed's lab, a sign is hung symmetrically by a light string. The string makes a V-shape due to the downward pull of the sign. The angle between the string (i.e., the angle of the V) is 96 degrees. The tension on each side of the string is 14 N. Determine the mass (in kg) of the sign.
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...
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... 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.
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... identifies the known and unknown quantities in an organized manner, equating given values to the symbols used to represent the corresponding quantity - e.g., m = 1.25 kg, µ = 0.459, vo = 0.0 m/s, Ø = 41.6º, vf = ???.
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... uses physics formulas and conceptual reasoning to plot a strategy for solving for the unknown quantity.
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... identifies the appropriate formula(s) to use.
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... performs substitutions and algebraic manipulations in order to solve for the unknown quantity.
Read About It!
Get more information on the topic of Vectors and Motion in Two Dimensions at The Physics Classroom Tutorial.
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