质点运动的几种典型形式.ppt
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1、一、匀速直线运动(straight line motion with constant velocity),(常数),二、匀加速直线运动(straight line motion with constant acceleration),(常数),自由落体运动(freely falling bodies),三、抛体运动(projectile motion),Path equation:,由于空气阻力,实际射程小于最大射程,求最大射程,当,END,四、圆周运动( circular motion),1. Angular variables(角量) in circular motion, Angula
2、r position,Position function,Angular displacement,Direction: defined in the direction of advance of a right-handed screw,Caution,A finite angular displacement is not a vector, an infinite angular displacement is!,Reason:,(disobey the Commutative law), angular velocity & angular acceleration,角速度:,角加速
3、度:,Counterclockwise(逆时针): positive direction Clockwise(顺时针) : negative direction,Two directions:,2.The intrinsic coordinate system(自然坐标系),Two unit vector are introduced to describe the circular motion:,is an unit vector tangent (相切)to the circle at A directing to the advance direction and an unit ve
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- 质点 运动 典型 形式
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