Question

Which of the quantity, velocity or acceleration determines the (2)

direction of motion?​

Answer 1

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In three dimensions, r-ro=vot+(1/2)at^2. Thus initial velocity and uniform acceleration both determine the direction of motion (displacement). At a given point also instantaneous velocity and acceleration will determine the direction of motion at that time.

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Answer 2

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In three dimensions, r-ro=vot+(1/2)at^2. Thus initial velocity and uniform acceleration both determine the direction of motion (displacement). At a given point also instantaneous velocity and acceleration will determine the direction of motion at that time.