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人教课标版必修2物理教材第4页运动合成演示实验;用的是红蜡块在玻璃管中匀速上升,然后用手拿着玻璃管使其在水平方向上匀速运动.本实验在实际教学演示过程中效果较差,主要原因:①观察上学生无法直观判断小蜡块在玻璃管中是否匀速上升②操作上手动很难做到在水平方向匀速运动③即
People teach class version compulsory 2 physics textbook Page 4 motion synthesis demonstration experiment; with the wax block is uniformly rising in the glass tube, and then holding the glass tube with a uniform motion in the horizontal direction.This experiment in the actual Less effective teaching demonstration process, mainly due to: ① observation of students can not directly determine the small wax in the glass tube is uniform rise ② operation is difficult to do in the horizontal direction of uniform motion ③ that is