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Physics, 24.07.2021 05:00 ramandeep

một người kéo một cái hòm nặng 20kg chuyển động trên mặt sàn nằm ngang với lực kéo Fk=10N, lực có phương song song với mặt sàn. Công của vật kéo khi vật đi đc quãng đường 5m là:

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một người kéo một cái hòm nặng 20kg chuyển động trên mặt sàn nằm ngang với lực kéo Fk=10N, lực có ph...

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