1 m³ of most types of wood has a mass of less than 1 ton, 1 m³ of fresh water has a mass of 1 ton. Since the kinetic energy (energy of the body’s motion) is directly proportional to the mass of the moving body, it will be greater for the body that has a large mass. Consequently, the kinetic energy of 1 m³ of wood is less than the kinetic energy of 1 m³ of water, given the same speed of movement.
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