Fysik opg 328-329 334


Opgave 3.28

LaTex: \begin{eqnarray} F_t &=& g\cdot m\\ F_{op} &=& 200N\\ \sum_{M_{hjul}} &=& 0 \\ &=&-F_t\cdot 0,2+F_{op}\cdot 1\\ F_t &=& \frac{F_{op}\cdot 1}{0,2}\\ &=& 1000 N\\ m &=& \frac{1000}{g}\\ &=& 101,83 kg\\ \end{eqnarray}

Opgave 3.29

LaTex: \begin{eqnarray}  \sum {M_O} &=& 0 \\    - F_t  \times 2m + F_{tr\ae k}  \times 4m &=& 0 \\   F_{tr\ae k}  &=& \frac{{F_t  \times 2m}}{{4m}} \\   F_t  &=& 19640N \\   F_{tr\ae k\left( y \right)}  &=& 9820N \\   F \times \sin \left( \alpha  \right) &=& 9820N \\   \alpha  &=& 90 - 55 = 35^\circ  \\    \\   \frac{{9820N}}{{\sin \left( {35} \right)}} &=& 17120,65N \\   \end{eqnarray}

Opgave 3.34

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Fejl i opgaven

Denne opgave er fuld af fejl pas

på når du bruger den som notater.

LaTex: \begin{eqnarray} m_{klods} &=& 5 kg\\ F_t &=& g\cdot m_{klods}\\ F_{snor} &=& sin(35)\cdot F_t\\ m_{lod} &=& \frac{g\cdot m_{klods}\cdot sin(35)}{m_{klods}} = 2,87 kg\\ m_{lod} &=& 3,5 kg\\ F_{snor} &=& m_{lod} \cdot g\\ F_{ts} &=& sin(35)\cdot F_t\\ F_{res} &=& F_{snor}-F_{ts}\\ A_{klods} &=& \frac{F_{res}}{m_{klods}} =  1,24\frac{m}{s^2}\\ \end{eqnarray}