(General PHY:Motion Q4) A boy throws a stone vertically up with a speed 18.1 m/s. Assuming that the
0A boy throws a stone vertically up with a speed 18.1 m/s. Assuming that the stone's motion is affected by the gravitaional acceleration only (acceleration g=9.8ms-2). What is the displacement in m between the stone's position at time 1.6 s and its initial position? (hint: displacement has a sign "+" or "-", the canvas system can accept signed input. upward direction is "+" and the downward direction is "-", gravitation acceleration is negative in sign)
一個男孩以 18.1 m/s 的速度垂直向上拋出一顆石頭。假設石頭的運動僅受重力加速度影響（加速度
g=9.8 m/s^2 ）。
在時間 1.6 秒時，石頭的位置與初始位置之間的位移是多少米？（提示：位移有正負號 "+" 或 "-"，系統接受帶符號的輸入，向上為正，向下為負，重力加速度為負值。）
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