\textbf{161-} Two objects A and B with equal initial velocities are thrown horizontally onto a horizontal surface. If the mass of object A is half the mass of object B, and the coefficient of friction of B is 2 times the coefficient of friction of A, find the distance that object A travels until it stops. How many times the distance that object B travels until it stops?
$$\frac{1}{2} \;(4) \qquad\qquad \frac{\sqrt{2}}{2} \;(3) \qquad\qquad 1 \;(2) \qquad\qquad 2 \;(1)$$
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