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設5秒初速度v,加速度為a 那麼,5秒末速度 (v+a) ,7秒初速度 (v+2a) ,7秒末速度 (v+3a) 有公式:v末² - v初 ² =2as (v+a)² - v² = 2a *10 (v+3a)² - (v+2a)² = 2a *10
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