Mechanical Advantage (id: f5f31fbe0)

本题目来源于试卷: Mechanical Advantage，类别为 美国物理杯赛(Physics Bowl)

[单选题]
03.45: A point-like object of mass 2.0 kg moves jfj )s b5/u6lqatcbf1 s:k/u.along the x- axis0gd4kqpur z 67 with a velocity of +4.0 m/s. A net horizontal force acting along the x-axis is applied to the object with the force-time profile shown. What is the total w6 pkqz7gudr 40ork that was done by the force?

A. 10 J
B. 20 J
C. 25 J
D. 65 J
E. 81 J


参考答案:  D


本题详细解析: 暂无

微信扫一扫，分享更方便