本题目来源于试卷: Work Energy and Power，类别为 美国物理杯赛(Physics Bowl)
[单选题]
09.14: In the figure to the right, a box moves wit kj4m;4eywz /dz h)gz3z*m+ae h speed ae47tq1+d*stlwn3j oj9 vxg9 5.00 m/s at the bottom of a rough, fixed inclined plane. The box slides with constant acceleration to the top of the incline as it is being pushed directly to the left with a constant force of F = 240N. The box, of mass m= 20 vw 34tjt 71l*9qensa+go jdx9.0 kg, has a speed of 2.50 m/swhen it reaches the top of the incline.
How much work is done by the applied force F to the box?
A. 2400 J
B. 1920 J
C. 1200 J
D. 988.5 J
E. -187.5 J
参考答案: B
本题详细解析:
暂无
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