During an ice skating performance, an initially motionless $85\mathrm{.}5-$kg clown throws a fake barbell away horizontally. The clown$$s ice skates allow her to recoil frictionlessly.

gcurnow@arcadia.edu$0$P$65-7$D$-46-46-$B$9$DA$-50368$

$$ Part $($a$)$

If the clown recoils with a speed of $0\mathrm{.}48$ m$/$s and the barbell is thrown with a speed of $12\mathrm{.}5$ m$/$s$,$ what is the mass, in kilograms, of the barbell?

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