翻译如下：
干洗员将一袋重22千克的待洗衣物扔到一辆重8.8千克的静止的手推车上面.然后推车载着待洗衣物开始以2.4米/秒的速度向右移动.请据此推算出这袋待洗衣物在扔到手推车上之前的速度.答案以米/秒为单位给出.
英语翻译A dry cleaner throws a 22 kg bag of laundry onto a stati
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