A $0\mathrm{.}034-kg$ pet lab mouse sits on a $0\mathrm{.}35-kg$ air$-$track cart, as shown in $($Figure $1).$ The cart is at rest, as is a second cart with a mass of $0\mathrm{.}25$ kg $.$ The lab mouse now jumps to the second cart. After the jump, the $0\mathrm{.}35-kg$ cart has a speed of $v_1=0\mathrm{.}83\frac{m}{s}.$

What is the speed $v_2$ of the mouse and the $0\mathrm{.}25-kg$ cart?

Express your answer to two significant figures and include appropriate units.

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$1$ of $1$