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“怎样滚得远”是苏教版四年级上册的一次综合与实践活动。在日常生活和生产中,人们经常会利用斜面来运输物体,达到省力的目的。凭借直觉,人们就能知道圆柱形物体滚动的距离,与斜面的长度,以及斜面与地面所成的角度等因素有关。至于这其中究竟有怎样的关系,则无法通过演绎推理解决,需要通过实验来研究。教材安排本次活动,目的在于引导
“How to go far ” is a comprehensive and practical activities of the fourth edition of the Sujiao version. In daily life and production, people often use bevels to transport objects to achieve the purpose of labor-saving. By intuition, one can know the distance that a cylindrical object rolls, depending on the length of the bevel and the angle the bevel makes to the ground. As to what kind of relationship among them, it can not be solved by deductive reasoning, we need to study through experiments. Teaching materials arranged for this event, the purpose is to guide