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2. A 30 kg girl is skating along at 2.2 m/s when one of the boys in her class skates up behind her and pushes

2. A 30 kg girl is skating along at 2.2 m/s when one of the boys in her class skates up behind her and pushes steadily on her back for 2 seconds. She ends up going 3 m/s. How much force was the boy applying? Include units. 9 hp

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