Two friends, Al and Jo, have a combined mass of 168 kg. At an ice skating rink they stand close together on skates, at rest and facing each other, with a compressed spring between them. The spring is kept from pushing them apart because they are holding each other. When they release their arms, Al moves off in one direction at a speed of 0.72 m/s, while Jo moves off in the opposite direction at a speed of 1.4 m/s. Assuming that friction is negligible, find Al's mass. kg

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Two friends, Al and Jo, have a combined mass of 168 kg. At an ice skating rink they stand close together on skates, at rest
and facing each other, with a compressed spring between them. The spring is kept from pushing them apart because they
are holding each other. When they release their arms, Al moves off in one direction at a speed of 0.72 m/s, while Jo moves
off in the opposite direction at a speed of 1.4 m/s. Assuming that friction is negligible, find Al's mass.
kg
Additional Materials
eBook
3,920
8
? ? TO
MacBook Air
%23
24
Vo
3
T
Transcribed Image Text:Two friends, Al and Jo, have a combined mass of 168 kg. At an ice skating rink they stand close together on skates, at rest and facing each other, with a compressed spring between them. The spring is kept from pushing them apart because they are holding each other. When they release their arms, Al moves off in one direction at a speed of 0.72 m/s, while Jo moves off in the opposite direction at a speed of 1.4 m/s. Assuming that friction is negligible, find Al's mass. kg Additional Materials eBook 3,920 8 ? ? TO MacBook Air %23 24 Vo 3 T
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