Mechanics: Vectors and Forces in 2-D
Vectors and Forces in 2-D: Audio Guided Solution
Problem Set NL20, Question 1:
Consider two blocks that are connected by a light string. Their masses are 11.0 kg (m
1) and 22.0 kg (m
2). A force of 102 N is applied to the 22.0-kg block (m
2) to pull the combination across a horizontal, frictionless surface.
a. Determine the acceleration of the system of two blocks.
b. Determine the tension in the string which connects the two blocks.
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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