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question 5
in uniform circular motion the
acceleration is vertical, while the velocity can be in any direction.
acceleration is parallel (or antiparallel) to the velocity.
acceleration is vertical and the velocity is horizontal.
acceleration is perpendicular to the velocity.

Explanation:

In uniform circular motion, the centripetal - force causes an acceleration that always points towards the center of the circle. The velocity vector is tangent to the circle at any point. Since a tangent is perpendicular to the radius (where the centripetal - acceleration acts), the acceleration is perpendicular to the velocity.

Answer:

acceleration is perpendicular to the velocity.