A 25 kg child is sliding to the right at 1.75 m/s on frictionless ice when he is struck by a barrage of 8 identical snowballs. If each snowball has a mass of 0.22 kg and a leftward velocity of 14 m/s, and if all of the snowballs stick to the child, what is the child's final speed? How many snowballs would need to hit the child in order to force him backwards on the ice? 

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This question involves the conservation of momentum The law of conservation of momentum states that ... View the full answer