问题 计算题

一个质量为4 kg的物体静止在足够大的水平地面上,物体与地面间的动摩擦因数μ=0.1。从t=0开始,物体 受到一个大小和方向呈周期性变化的水平力F作用,力F随时间的变化规律如图所示。求83秒内物体的位移大小(g取10 m/s2)。

答案

167 m

判断题
材料题

阅读材料,结合所学知识回答问题:

       长期以来,日本国内总有一些势力矢口否认日本在中国犯下的滔天罪行,日本右翼势力编写修改的所谓中学历史教科书,拒不反省自己发动侵略战争的罪责,包括日本前首相小泉纯一郞在内的日本政界和军界要人多次参拜摆放着日本战犯牌位的“靖国神社”。

请回答:

(1)你能举出日本在中国犯下的滔天罪行的具体事例吗?

                                                                                                                                                            

                                                                                                                                                            

                                                                                                                                                            

(2)从世界和平发展的角度,日本的这些作法你想到了什么?

                                                                                                                                                            

                                                                                                                                                            

(3)你认为日中关系应当怎样发展?