In th exp erim ent, the motion of a body was inv eati gate d. an a resu It of whic h the aver age speed and its absolute rror wer e obtaine d bar (V)=312.0m/s Delta bar (V)=20.483ldots m/s Plea se in dica to the c orre at reco rd of the final rea ult o { thì a exp erim lent V=(312.0+20.5)m/s V=(312pm 20.48)m/s V=(312.0-21)m/s V=(312.0pm 20.5)m/s V=(312pm 20.483)m/s V=(312.0pm 20.4)m/s

The correct record of the final result of this experiment is: Explanation:In this experiment, the motion of a body was investigated, and the average speed and its absolute error were obtained. The average speed is given as , and the absolute error is given as .The correct record of the final result should include both the average speed and the absolute error. The absolute error should be included as a positive or negative value, indicating the range within which the true value of the speed may lie.Therefore, the correct record of the final result is , which indicates that the speed of the body is between and .