2012年江苏高考物理卷第4题,是一个以图像为信息载体的典型力学题.虽然它的情景熟悉,但设问新颖,令人耳目一新.该题着重考查考生应用数学处理物理问题的能力.是能力立意,考查深刻的好题.题目将一只皮球竖直向上抛出,皮球运动时受到空气阻力的大小与速度的大小成正比.下列描绘皮球在上升过程中加速度大小a与时间t关系的图像中,可能正确的是 The fourth issue of the physical examination of the Jiangsu College Entrance Exam in 2012 is a typical mechanical problem with the image as the carrier of information. Although its context is familiar, the novelty of the design is refreshing. This question focuses on the ability of candidates to apply mathematics to physical problems. It is the ability to develop and examine profound problems. The problem is to throw a ball upwards and upwards. The air resistance of the ball is proportional to the size of the air speed. The relationship between the acceleration of the ball during the ascent and the time t is shown below. The image may be correct