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course phy 21
Which vector represents the velocity, and which represents the acceleration? When is the acceleration vector longest? When is the velocity vector longest? When do the vectors have the same direction, and when are their directions opposite?Repeat but move the dot as quickly as possible from left to right. Describe the behaviors of the two vectors.
velocity- green
blue- acceleration
acceleration is longest when it is dragged as quickly as possibly.
The velocity is longest when moving at a steady speed.
The vectors move in the same direction when moving at first, but are different when to dragging slows.
Now start in the upper left-hand corner, moving at first to the right, but as you continue to move to the right gradually begin arcing downwards so that you follow a graceful (?) curve from upper right to lower left. Describe the behavior of the velocity and acceleration vectors.
Moving right- the velocity and acceleration vectors move in the same direction (right) but then as the velocity slows, the acceleration vectors points toward the left.
Moving down/left- they both point toward the bottom left corner at first but then the acceleration begins to point toward the top right as dragging slows.
Now move the dot around a circular path. Follow a slow circular path, then try to double your speed along the same path. How does the direction of the acceleration vector compare with that of the velocity vector? If you double the speed, then what happens to the magnitudes of the velocity vector and the acceleration vector?
The velocity vector always points in the direction of movement and the acceleration toward the middle. As you move it faster, the acceleration vector is larger than the velocity vector. "
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Very good.
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