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Direct linkMunera, Hector A. – Physics Teacher, 2010
It has been suggested that Einstein's principle of equivalence (PE) should be introduced at an early stage. This principle leads to the notion of local effective gravity, which in turn defines effective vertical and horizontal directions. Local effective gravity need not coincide with the direction of terrestrial gravity. This paper describes…
Descriptors: Science Activities, Science Instruction, Physics, Scientific Concepts
