Đáp án:
\(\begin{array}{l}
a.\\
v = 0,86m/s\\
b.\\
v = 1,1m/s
\end{array}\)
Giải thích các bước giải:
\(\begin{array}{l}
a.\\
p = |{p_{xe}} - {p_{vat}}|\\
({m_{xe}} + {m_{vat}})v = |{m_{xe}}{v_{xe}} - {v_{vat}}{m_{vat}}|\\
(98 + 2)v = |98.1 - 2.6|\\
v = 0,86m/s\\
b.\\
p = {p_{xe}} + {p_{vat}}\\
({m_{xe}} + {m_{vat}})v = {m_{xe}}{v_{xe}} + {v_{vat}}{m_{vat}}\\
(98 + 2)v = 98.1 + 2.6\\
v = 1,1m/s
\end{array}\)