Chapter 2&3 Kinematics Chapter 2 &3 Motion in one Dimension. Two and Three Dimensions 1. Reference frames and displacement 2. Velocity 3. Acceleration 4. Circular motion
Chapter 2&3 Kinematics Chapter 2 & 3 Motion in One Dimension, Two and Three Dimensions 1. Reference Frames and Displacement 2. Velocity 3. Acceleration 4. Circular Motion
New words Reference frames 参考系 Position 位置 Displacement 位移 S peed 速率 Velocity 速度 Acceleration 加速度 Circular motion 圆周运动 Relative motion 相对运动 Translational motion 平动 Particle 质点
New Words Reference Frames 参考系 Position 位置 Displacement 位移 Speed 速率 Velocity 速度 Acceleration 加速度 Circular Motion 圆周运动 Relative Motion 相对运动 Translational motion 平动 Particle 质点
Chapter 2&3 Kinematics Mechanics(力学): The Science of motion and its causes Mechanics is customarily divided into two parts Kinematics(运动学)→> description of motion.( Chapter2 3, P16-P76) Dynamics(动力学)→ causes of motion (Chapter4-11, P77-P296)
Chapter 2&3 Kinematics Mechanics（力学）: The Science of motion and its causes. Kinematics（运动学）→ description of motion. (Chapter2 & 3, P16 - P76) Dynamics（动力学）→ causes of motion. (Chapter4-11, P77 – P296) Mechanics is customarily divided into two parts:
Chapter 2&3 Kinematics 2-1&3-6 Reference frames(参考系) and Displacement(位移)P17-18 The world, and everything in it, moves. Even seemingly stationary things, such as a house moves with the earth. the earth's orbit around the sun. the suns orbit around the center of the milky Way galaxy, and that galaxy's migration relative to other galaxies 绝对静止的物体是没有的运动的绝对性
Chapter 2&3 Kinematics 2-1&3-6 Reference Frames （参考系） and Displacement（位移）P17-18 The world, and everything in it, moves. Even seemingly stationary things, such as a house moves with the Earth, the Earth’s orbit around the Sun, the Sun’s orbit around the center of the Milky Way galaxy, and that galaxy’s migration relative to other galaxies. 绝对静止的物体是没有的—— 运动的绝对性
Chapter 2&3 Kinematics 1 Reference frame参考系 To describe the position of an object, the other object referred to( Reference frame参照系) should be chosen. It is arbitrary 为描述物体的运动而选择的标准物叫做参考系. 选取的参考系不同,对物体运动情况的描述不 同,这就是运动描述的相对性
Chapter 2&3 Kinematics To describe the position of an object, the other object referred to (Reference Frame 参照系） should be chosen. It is arbitrary. 为描述物体的运动而选择的标准物叫做参考系. 选取的参考系不同，对物体运动情况的描述不 同，这就是运动描述的相对性. 1 Reference Frame 参考系