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:<br /><br />$V=(312\pm 20.483)m/s$<br /><br />Explanation:<br />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 $\bar{V}=312.0m/s$, and the absolute error is given as $\Delta \bar{V}=20.483m/s$.<br /><br />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.<br /><br />Therefore, the correct record of the final result is $V=(312\pm 20.483)m/s$, which indicates that the speed of the body is between $291.517m/s$ and $332.483m/s$.