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牛顿第二定律反映物体的加速度与所受合外力间的关系,运用牛顿第二定律分析求解物理问题的方法,是物理学的重要方法,也是历年高考的热点.下面解析三个典型例题,仅供参考.一、求解抛掉物体的质量物体在几个力的作用下运动,若已知物体的总质量和抛出物体前的初速度、时间、位移,以及抛出物体后的时间、速度减少量,可根据牛顿第二定律求解抛掉物体的质量.例1科研人员乘气球进行科学考察.气球、座舱、压舱物
Newton’s second law reflects the relationship between the acceleration of the object and the applied force, the use of Newton’s second law to analyze the method of solving physical problems, is an important method of physics, but also calendar year’s hottest entrance examinations below three typical examples, only For reference.A solution to the object of the quality of the object under the action of several forces, if the total mass of the object and the object is thrown before the initial velocity, time, displacement, and the time thrown objects, speed Reduce the amount, according to Newton’s second law to solve the object of throwing the quality of .Example 1 scientific research personnel balloon scientific investigation balloon, cockpit, ballast