An object is moving along a circular path of radius r. (5 marks)

Question

(a) Show that its velocity vector is perpendicular to the radial rays at any moment. This confirms that the velocity vector is tangent to the path, as it should be.
(b) Show that its acceleration vector is perpendicular to its velocity vector if the object rotates with a fixed speed. This confirms that the acceleration vector will be parallel to the radial ray at any moment