HW35#3 – A dog stands on a flatboat at distance D from the shore. It walks 2.3 m along the boat toward…

歡迎來到Yogi老師解題給你看,今天我要講解的是AP Physics C Mechanics的問題

這是一題典型的Center of Mass的問題,我們都要把每個物體的CM轉換成座標,由於沒有受到外力,所以整個系統的Center of Mass是不會動的,用這樣的觀念去推理就可以,詳細的說明請參考影片

In figure, a 3.5 kg dog stands on a 21 kg flatboat at distance D = 6.1 m from the shore. It walks 2.3 m along the boat toward shore and then stops. Assuming no friction between the boat and the water, find how far the dog is then from the shore.