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course Phy 201
2:29 pm EST 6/10/14
When going left to right and speeding up, acceleration and velocity is negative. When going is this direction while slowing down, velocity is positive while acceleration is negative.
When going right to left and speeding up, acceleration and velocity is positive. When going this direction while slowing down, velocity is negative
while acceleration is positive.
While going in a circle at constant velocity, velocity is in direction of ciculular motion while acceleration is pointed toward the center of the
circle because the vector (change in velocity) is directed here. When going fast in the cirle, the vectors are closer to going in the same direction.
Generally, an object is speeding up in a direction when both vectors have the same sign (both positive or both negative) and slowing down when signs
are opposite.
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Excellent insights.
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