（英文版）大学物理－力学.ppt

文档介绍：MECHANICS
Kinematics of particles
ics of particles
Geostatics and Hydromechanics
Special relativity
Dep. physics
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Kinematics of particles ——describing motion of particles
1. Base conception
2. Important conception
3. Discussion of curve motion
4. Relative motion
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Base conception
Particles
to describe an object whose parts all move in exactly the same way. Even plex object can be treated as a particle if there are no internal motions.
Reference frame and Coordinate frame
Vectors
a physical quantity that requires the specification of both direction and magnitude.
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2. Important conception
Position vector
Displacement vector
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Velocity vector
① average velocity
② instantaneous velocity
Acceleration vector
① average acceleration
② instantaneous acceleration
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(例) 以下为质点的位置矢量:
( 为正常数)
求质点的速度、加速度,并分别求出速度、加速度的大小和方向。
解:
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方向为x轴方向
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