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$$\begin{gathered} v_E=\sqrt{\frac{2k^2.W_A}{m}} \\ {h}_E=\frac{W_A}{\left(1-k^2\right)mg} \end{gathered}$$

$$\begin{gathered} v_E=\sqrt{\frac{2k}{k+1}.\frac{W_A}{m}} \\ {h}_E=\frac{W_A}{\left(k+1\right)mg} \end{gathered}$$

$$\begin{gathered} v_D=\sqrt{\frac{2W_A}{m}} \\ {h}_B=\frac{W_A}{mg} \\ {W}_A=mg{h}_A+\frac{1}{2}m{v_A}^2 \end{gathered}$$

$$\begin{gathered} A_T=A_N=0 \\ {A}_{Fht} \end{gathered}$$

Mặt nghiêng $\alpha$

$A_{Fms}=-F_{ms}.s=-\mu mgs\cos \left(\alpha \right)=-\mu P.\left(h_2-h_1\right).\cos \left(\alpha \right).\sin \left(\alpha \right)$

Lực tác dụng lệch $\beta$

$A_{Fms}=-F_{ms}.s=-\mu \left(P\pm F\sin \left(\beta \right)\right).s$

$A_{Fms}=F_{ms}.s.\cos \left(180°\right)=-\mu P.s$

$A_P=mg.\left(h_1-h_2\right)$

$D=\frac{m}{V}$

Cầu lồi : $N=P-m\frac{v^2}{R}$

Cầu lõm : $N=P+m\frac{v^2}{R}$

$k∆l.\sin \left(\alpha \right)=mg\cos \left(\alpha \right)=m{\omega }^2\left(l_0+∆l\right)\sin \alpha$