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    reekmister's Avatar
    reekmister Posts: 1, Reputation: 1
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    #1

    Aug 11, 2013, 02:52 PM
    You (50 kg mass) skate on ice at 4.6 m/s to greet your friend (54 kg mass)
    You (50 kg mass) skate on ice at 4.6 m/s to greet your friend (54 kg mass), who is standing still, with open arms. As you collide head-on, while holding each other, with what speed do you both move off together?
    ebaines's Avatar
    ebaines Posts: 12,131, Reputation: 1307
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    #2

    Aug 12, 2013, 05:36 AM
    Use conservation of momentum to find the final velocity:
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