Đáp án:
\(\begin{array}{l}
a.{h_{\max }} = 5m\\
b.{h_{\max }}' = 4,5455m
\end{array}\)
Giải thích các bước giải:
\(\begin{array}{l}
a.\\
{W_{t\max }} = {W_{d\max }}\\
mg{h_{\max }} = \frac{1}{2}mv_{\max }^2\\
10.{h_{\max }} = \frac{1}{2}{.10^2}\\
\Rightarrow {h_{\max }} = 5m\\
b.\\
W - W' = {A_c}\\
{W_{d\max }} - {W_{t\max }}' = {A_c}\\
\frac{1}{2}mv_{\max }^2 - mg{h_{\max }}' = {F_c}{h_{\max }}'\\
\frac{1}{2}{.10^2} - 10{h_{\max }}' = 1.{h_{\max }}'\\
\Rightarrow {h_{\max }}' = 4,5455m
\end{array}\)