日常生活中的科学
Why does a ball fall?
A falling object trades gravitational potential energy for kinetic energy; total energy is conserved when losses are accounted for.
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简短答案
A falling object trades gravitational potential energy for kinetic energy; total energy is conserved when losses are accounted for.
真正发生了什么？
Near Earth, gravity accelerates a released object downward. As it falls, gravitational potential energy is converted mainly into kinetic energy, with air resistance transferring some energy to the surroundings.
一个有用的直观图景
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Near Earth, gravity accelerates a released object downward. As it falls, gravitational potential energy is converted mainly into kinetic energy, with air resistance transferring some energy to the surroundings.