英语翻译Lillian (mass 40.0 kg) standing on slippery ice catches her leaping dog (mass 15 kg) moving horizontally at 2.0 m/s.What is the speed of Lilian and her dog after the catch?

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英语翻译
Lillian (mass 40.0 kg) standing on slippery ice catches her leaping dog (mass 15 kg) moving horizontally at 2.0 m/s.What is the speed of Lilian and her dog after the catch?

莉莉安(40kg)在光滑的冰面上接住了她的正在以2m/s的速度行进的狗(15KG).莉莉安在借助她的狗之后速度是多少?
40*0+15*2=X*(15+40)
X=0.55m/s

莉丽安(质量40公斤)站在光滑的冰面上,她的狗(质量15公斤)以每秒2米的速度跳跃前进。如果莉丽安牵住她的狗,牵住后他们的速度是多少。