Đáp án:
\(\begin{array}{l}
a.W = {W_{d\max }} = 5J\\
b.{h_{\max }} = 5m\\
c.h = 2,5m
\end{array}\)
Giải thích các bước giải:
\(\begin{array}{l}
a.\\
{W_{d\max }} = \frac{1}{2}m{v_{\max }}^2 = \frac{1}{2}.0,{1.10^2} = 5J\\
\Rightarrow W = {W_{d\max }} = 5J\\
b.\\
W = {W_{t\max }}\\
5 = mg{h_{\max }}\\
5 = 0,1.10{h_{\max }}\\
\Rightarrow {h_{\max }} = 5m\\
c.\\
{W_d} = {W_t} = \frac{W}{2}\\
mgh = \frac{5}{2}\\
0,1.10.h = 2,5\\
\Rightarrow h = 2,5m
\end{array}\)
