The potential energy (PE) of the Apple can be calculated using the formula PE = mgh, where m is the mass (4 kg), g is the acceleration due to gravity (approximately 9.81 m/s²), and h is the height (2 m). Substituting these values gives PE = 4 kg × 9.81 m/s² × 2 m = 78.48 joules. Thus, the energy of the 4 kg Apple sitting on a 2 m high tree branch is approximately 78.48 joules.
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