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# To get off a frozen, frictionless lake, a $65.0\ \mathrm{kg}$ person takes off a $0.150\ \mathrm{kg}$ shoe and throws it horizontally, directly away from the shore with a speed of $2.00\ \mathrm{m/ s}$. If the person is $5.00\ \mathrm{m}$ from the shore, how long does he take to reach it?

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To get off a frozen lake, the person of mass:

$M=65\text{ kg}$

takes off a shoe of mass

$m=0.150\text{ kg}$

and throws it horizontally, directly away from the shore with speed

$u=2.0\text{ m/s}$

Let us consider the person got a speed $v$ after throwing his shoe.

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