本题目来源于试卷: Newton’s law of motion，类别为 美国物理杯赛(Physics Bowl)
[单选题]
99.16: Which of the following /za oz)2zpnv/g esb. 0fxhh-1 x;0nhs principles best ex26e yr s.pyt;xplains why large tractor-trailer trucksyty .x;pr 2e6s generally accelerate much more slowly that automobiles?
A. To every action there is an equal reaction.
B. Everybody attracts every other body in the universe.
C. A force is necessary to change the speed or direction of a body.
D. The total momentum of interacting bodies is always conserved.
E. The acceleration of a body is inversely proportional to its mass and directly proportional to the external force acting on the body.
参考答案: E
本题详细解析:
暂无
| 
