Question

what determines the direction of motion of an object velocity or acceleration​

Answer 1

Answer:

The direction of motion of an object at any point in space is determined by its instantaneous velocity at that point. The acceleration is a measure of the change of velocity in unit time at that point which need not be in the same direction as the direction of the motion of the object.

Answer 2

Answer:

Velocity determines the direction of motion.

The acceleration of the body does not determine its direction of motion while velocity determines its direction of motion. Positive or negative sign of acceleration indicates if the velocity is increasing or decreasing whereas positive or negative sign of velocity indicates the direction of motion.