Huab tais lub laij lej

Qhov nruab nrab ntsuas nrawm nruab nrab


Kev tshaj tawm yog dab tsi?

Kev nrawm yog qhov ntau thiab tsawg. Yog li koj tuaj yeem tsuas hais ua piv txwv: "Kuv lub tsheb tuaj yeem mus 20 mph".
Ntawm qhov ntsuas nrawm yog vector kom muaj nuj nqis yog li nws tsis suav nrog kev ntsuas ntawm qhov ceev xwb tab sis kuj muaj qhov taw qhia. Piv txwv rau qhov no yuav yog: "kwv yog txav 2.6 m / s sab qaum teb."



Cov qauv tau txais qhov nrawm nrawm

\( v_a = \dfrac{v + v_0}{2} \ \ \) qhov twg

\( v_a \) yog nrab tshaj tawm
\( v \) yog tshaj tawm
\( v_0 \) yog pib tshaj tawm

Qhov nruab nrab nrawm va = {{ result}}





Cov mis kom tau pib tshaj tawm

\( v_0 = 2 \cdot (v_a - v) \ \ \) qhov twg

\( v_0 \) yog pib tshaj tawm
\( v_a \) yog nrab tshaj tawm
\( v \) yog tshaj tawm

Thaum pib nrawm v0 = {{ result}}





Cov mis kom tau tshaj tawm

\( v = 2 \cdot (v_a - v_0) \ \ \) qhov twg

\( v \) yog tshaj tawm
\( v_0 \) yog pib tshaj tawm
\( v_a \) yog nrab tshaj tawm

Khawv Koob v = {{ result}}