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Apulley system is used to lift a 2,000 newton engine up a distance of 3 meters. the operator must apply a force of 250 newtons to the chain of the pulley system to lift the motor. to lift the engine 3 meters, the operator must pull a total of 30 meters of chain through the pulley system. what is the value of di?
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một ô tô chuyển động nhanh dần đều. Sau 10s vận tốc của xe tăng từ 2m/s lên 6m/s. Tính gia tốc của ô...
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