[Q] Sister on a swing: Your little sister (25 kg) is sitting on a 3m long swing. If you pull her back 2.0m and let go, what is her speed at the bottom? Find the answer at least 2 different ways.
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The potential energy at the starting position can be calculated using the formula: PE = mgh, where m is the mass (25 kg), g is the acceleration due to gravity (9.8 m/s^2), and h is the height (3 m). PE = 25 kg * 9.8 m/s^2 * 3 m = 735 J Show more…
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