Mechanics: Vectors and Forces in 2-D
Vectors and Forces in 2-D: Audio Guided Solution
Extra Problem 20:
An automobile dealership has chosen to hang a car outside the entry to their showroom. The car's mass is 1050 kg. The car's weight will be supported by a heavy-duty chain which pulls upwards and leftwards. A beam will push outward to balance the inward pull of the chain. The manufacturer of the chain claims it has a breaking strength of 32200 Newtons. Village code requires that there be a safety factor of 2.2. That is, the actual tension in the chain must be no more than 1 / 2.2 of the breaking strength. What is the minimum angle (in degrees) at which the dealership can hang the car?
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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