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Pheluros
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2023-03-18 11:25:42
a=2h/t^2 = 1,2m/s^2
Fk - Fms=ma => Fk= ma+Fms
Fk=2000x1,2 + 0,25x2000x10=7400(N)
=>AFk= 7400 x (3x5) = 111000(J)
P=22200(W)
P/s: tôi làm bài này trắc nghiệm không có câu trả lời giống đáp án =))))