Mechanics: Vectors and Forces in 2-D
Vectors and Forces in 2-D: Audio Guided Solution
Problem Set F2D12, Question 6:
Janesh exerts a force at a 19.5° angle relative to an inclined plane in order to pull a 117-N sled up the incline at a constant speed. The angle of the incline is 35.0°. The coefficient of friction between the incline and the sled is 0.269. Determine the force with which Janesh must pull to move the sled 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...
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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.
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