Physics College Entrance Examination Questions Garden

Author: Chief Editor: Cao Jisheng
Publisher:
Publish Date: 2000-09-01
Features: Synopsis This book is written by physics teachers from Fudan University Affiliated High School based on years of experience in Gaokao tutoring, combined with the trends of quality education in the coming years. The book contains 13 sets of Gaokao unit review questions, 2 sets of experiment questions, 5 sets of comprehensive exercises, and 4 sets of Gaokao mock tests, totaling 24 sets of papers. Each set of papers includes answers and hints. This book is specifically designed to adapt to the new teaching syllabus and examination syllabus adopted from 2000 onwards, keeping up with the new ideas and concepts of the current Gaokao, helping high school students graduating in the 21st century to better adapt to the trends of Gaokao reform. The book is suitable for high school students to use when entering Gaokao review, and can also be used as a teaching reference for high school physics teachers. Excerpt: The other end C is a pulley. A rope tied to the heavy object G passes through the pulley and is fixed at point A on the wall. The rod is in perfect balance. If the A end of the rope is moved downward along the wall and then rebalanced (with the mass of the BC rod, pulley, and rope, as well as friction, all ignored), then ( ). (A) The tension in the rope increases, and the pressure on the BC rod increases (B) The tension in the rope remains unchanged, and the pressure on the BC rod decreases (C) The tension in the rope remains unchanged, and the pressure on the BC rod increases (D) The tension in the rope remains unchanged, and the pressure on the BC rod remains unchanged 8. A smooth hemispherical object is fixed on a horizontal surface. A smooth small pulley is located directly above the center of the sphere. One end of a light rope is tied to a small ball, placed at point A on the hemisphere, and the other end is looped around the fixed pulley and pulled to keep the ball stationary, as shown in Figure 1-6. The pulley and the ball can be considered as point masses. Now, slowly pull the rope to move the ball along the hemisphere from point A to the highest point B. During this process, the changes in the magnitude of the normal force N exerted by the hemisphere on the ball and the tension T exerted by the rope on the ball are ( ). (A) N increases, T decreases (B) N decreases, T increases (C) N remains unchanged, T decreases (D) N decreases, T first decreases and then increases