[解題] 國三 理化 自由落體
1.年級:國三
2.科目:理化
3.章節:自由落體
4.題目:站在地面上垂直向上拋出一石頭,試問V-T圖的關係為下列何種情形?
http://imgur.com/LPABncb
5.想法:
我認為:
(1)垂直上拋的時候,速度和重力加速度會呈現反方向,所以在此階段
應該會減速
(2)到達最高點後降落的時候,速度和重力加度會呈現同方向,所以在
此階段應該會加速
綜合(1)(2)後,我是選擇(C)選項,但是答案給的是(A)選項
是不是我的想法有誤呢??
還請版上的各位老師不吝幫忙,謝謝
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