関連ワード:  is acceleration zero when velocity is zero    is acceleration always zero when velocity is zero    is acceleration zero if velocity is zero    why is acceleration not zero when velocity is zero    can acceleration be zero when velocity is zero    acceleration must be zero when velocity is zero    can acceleration be non zero when velocity is zero    acceleration may be non zero when velocity is zero    if acceleration is zero then velocity is zero    acceleration is zero but velocity is not zero  
結果 : is acceleration zero when velocity is zero