A brick falls from the crumbling wall of an old house. At the start of its fall, it has only 20 J20 J of gravitational potential energy. At the end of its fall, it has only 20 J20 J of kinetic energy. Calculate how much gravitational potential energy the brick has at the end of its fall.
Question
A brick falls from the crumbling wall of an old house. At the start of its fall, it has only 20 J20 J of gravitational potential energy. At the end of its fall, it has only 20 J20 J of kinetic energy. Calculate how much gravitational potential energy the brick has at the end of its fall.
Solution
Para resolver este problema, sigamos los siguientes pasos:
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Entender la conservación de la energía: La energía mecánica total de un sistema aislado (sin pérdidas por fricción, resistencia del aire, etc.) se conserva. Esto significa que la suma de la energía potencial gravitacional y la energía cinética permanece constante.
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Identificar las energías iniciales y finales:
- Energía potencial gravitacional inicial (E_p inicial): 20 J
- Energía cinética inicial (E_k inicial): 0 J (ya que el ladr
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