Answers

(1)vーtグラフの傾き(速度の時間変化÷経過時間)が加速度なので、
0〜10秒→(10-0)÷(10-0)=1.0 m/s²
10〜25秒→ (10-10)÷(25-10)=0 m/s²
25〜35秒→ (0-10)÷(35-25)= -1.0 m/s²

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