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    usama718's Avatar
    usama718 Posts: 1, Reputation: 1
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    #1

    Dec 9, 2012, 03:03 AM
    Physics questions answered free
    Two equal masses travel towards each other on a frictionless air track at speed pf 60cms-1 and 30cms-1.they stick together on impact what is the speed of the masses after impact?
    ebaines's Avatar
    ebaines Posts: 12,131, Reputation: 1307
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    #2

    Dec 10, 2012, 08:09 AM
    Use conservation of momentum on this problem:



    Remember that since the mases are initially moving toward each other, one positive initial velocity and the other is negative.
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