41-高中物理高考适应训练题(三)（41- high school physics college entrance examination training questions (three)）.docVIP

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41-高中物理高考适应训练题(三)（41- high school physics college entrance examination training questions (three)）.doc

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41-高中物理高考适应训练题(三)（41- high school physics college entrance examination training questions (three)）

41-高中物理高考适应训练题(三)（41- high school physics college entrance examination training questions (three)） The college entrance examination to senior high school physics exercises (three) Volume I choice One Two Three Four Five Six Seven Eight Nine Ten Eleven Twelve A RadioButtonList (each question how many points, the total number of points) As figure 1. shows, in quality as the object and has a smooth circular orbit, a mass of small circular orbit circular motion in a vertical plane along the highest point, A and C were the lowest and the two road, B, D and O two center on the same level. The ball movement process, stationary objects on the ground, on the object of friction direction pressure and ground objects on the ground, the correct statement is: [] A. ball movement at point A, the friction direction left . B. ball movement at point B, =, friction force to the right direction C. ball movement at point C, = (+), the ground without friction on M D. ball movement at point D, = (+), the friction force to the right direction 2. two spacecraft A and B before and after operation on the same planet around a circular orbit, if after B to catch up with the former A, you need to: [] A. increase rate of the latter B To reduce the rate of B. decreased quality of the former A C. which B radius decreases first and then increases, so as to meet with the former A D. was unable to catch up The quality of the ground level 3. clinohedral B in smooth and inclined bottom side. There is a quality and clinohedral similar block A on the slope, the top is long, and the parallel and horizontal plane. As shown in the block from the top down A B to contact the ground, clinohedral B back distance: [] A.B.C.D. Figure 4. fixed smooth hemisphere in the horizontal plane, the center of O is fixed above a small fixed pulley, wire is tied to a ball, placed in the hemisphere on the surface of A, the other end around a fixed pulley. The ball will slowly from point A to point B, in this process, the tensio