發送短信 : Exploring students' conceptions of forces in uniform circular motion

 _____     __   __    _____     ______   ______   
|  __ \\   \ \\/ //  / ____||  /_   _// |      \\ 
| |  \ ||   \ ` //  / //---`'   -| ||-  |  --  // 
| |__/ ||    | ||   \ \\___     _| ||_  |  --  \\ 
|_____//     |_||    \_____||  /_____// |______// 
 -----`      `-`'     `----`   `-----`  `------`