Chapter03 - Chapter3:MotioninTwoor ThreeDimensions

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Chapter 3 : Motion in Two or  Three Dimensions
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Motion of a particle in space Position : Displacement : Average velocity: Instantaneous velocity 1. Position and Velocity Vectors One dimension Position: x coordinate
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A velocity in the xy -plane can be decomposed into separate x and y components. Direction is the tangential direction of the path. Trigonometry will aid the determination.
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2. Acceleration Vector Average acceleration: Instantaneous acceleration
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The acceleration vector can result in a change in either the magnitude OR the direction of the velocity.
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The figure shows velocity and acceleration as time passes.
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Direction of acceleration with respect to velocity Parallel and perpendicular components of acceleration a r a r
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Velocity and acceleration vectors for a particle moving on a curved path Notice the acceleration vector change as velocity decreases, remains the same, or increases. Constant speed
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Chapter03 - Chapter3:MotioninTwoor ThreeDimensions

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