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i just came across a question where i had to apply the conservation of linear momentum theorem. a block with certain velocity slides on to a wedge (not fixed with the ground, ground is frictionless). when the block slides on to the wedge ,, why do they have a common horizontal velocity ...

i want to buy a att 4g phone between these two but i don, what a phone that is updateless in like 4 months thanks

I want to know if I should get a evo 4g flash to metro or wait for a android to come to metro