质量2kg的质点，在两个力F1=2N，F2=8N的作用下，获得的加速度大小可能是（ ）
A．4m/s2
B．6m/s2
C．1m/s2
D．2m/s2
ABCD、当两力反向时合力最小，最小值为8N-2N=6N；两力同向时合力最大，最大值为8N+2N=10N；
两力的合力范围为6N～10N，由牛顿第二定律得：a=F m
可知，加速度的最小值为3m/s2；最大值为5m/s2；故A正确，BCD错误．
故选：A．
A. In a school magazine. B. In a national paper. C. In a guide book. D. In a university daily newspaper. 2.If you are interested in arts, where would you go for a visit? A. Leacock 116. B. Union room 423. C. Union room 108. D. Newman Centre, 3484 Peel. 3.Which of the following is the name of a play? A. Blazing Saddles. B. Guess Who's Coming to Breakfast. C. Importance of deciding basic goals of the Women's Union. D. Unskilled Labours on Rivers and Canals in Upper Canada, 1820-1850. | |||||||||