Math Problem Statement
29. Llancem un cos d’1 kg de massa a una velocitat de 10 m/s sobre un pla inclinat que forma un angle de 300 amb la superfície horitzontal. El cos s’atura després d’haver recorregut 8 m sobre el pla. Calcula: a) El treball exercit per la força de fregament. b) La quantitat de calor produïda. c) El coeficient de fregament entre el cos i el pla.
Solution
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Math Problem Analysis
Mathematical Concepts
Kinetic Energy
Potential Energy
Work-Energy Principle
Friction
Formulas
Kinetic Energy: E_k = (1/2) m v^2
Potential Energy: E_p = m g h = m g d sin(θ)
Work-Energy Principle: W_total = E_k + E_p
Friction Work: W_f = -μ N d
Theorems
Work-Energy Theorem
Suitable Grade Level
High School (Grades 10-12)
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