So sánh công tương ứng của các lực F 1 → ;   F 2 → ; F 3 → " 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style="width: 68.00px; height: 25.33px; margin-left: 0.00px; margin-top: 0.00px; transform: rotate(0.00rad) translateZ(0px); -webkit-transform: rotate(0.00rad) translateZ(0px);" title="stack F subscript 1 with rightwards arrow on top semicolon space stack F subscript 2 with rightwards arrow on top semicolon stack F subscript 3 with rightwards arrow on top"> khi điểm đặt của các lực này dịch chuyển cùng một quãng đường từ A đến B (Hình 4.7).

Giải thích

Ba lực F 1 → ;   F 2 → ; F 3 → " 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" style="width: 68.00px; height: 25.33px; margin-left: 0.00px; margin-top: 0.00px; transform: rotate(0.00rad) translateZ(0px); -webkit-transform: rotate(0.00rad) translateZ(0px);" title="stack F subscript 1 with rightwards arrow on top semicolon space stack F subscript 2 with rightwards arrow on top semicolon stack F subscript 3 with rightwards arrow on top"> có cùng một hình chiếu trên phương của độ dời A B → " src="data:image/jpeg;charset=utf-8;base64,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" style="width: 20.00px; height: 16.00px; margin-left: 0.00px; margin-top: 0.00px; transform: rotate(0.00rad) translateZ(0px); -webkit-transform: rotate(0.00rad) translateZ(0px);" title="stack A B with rightwards arrow on top"> ,do đó công thực hiện đều bằng nhau.