What is the angle between velocity vector and acceleration vector in unitorm circular motion ?

Velocity vector and acceleration vector in a uniform circular motion are related as

Velocity vector and acceleration vector in a uniform circular motion are related as

A particle starts travelling on a circle with constant tangential acceleration. The angle between velocity vector and acceleration vector, at the moment when particle completes half the circular track. Is

Angle between Vectors

Assertion In projectile motion, the angle between instanteneous velocity vector and acceleration vector can be anything between o to pi (excluding the limiting case) Reason In projectile motion, acceleration vector is always pointing vertically downwards. (Neglect air friction.)

If the angle (theta) between velocity vector and the acceleration vector of a moving particle is 90^(@) lt theta lt 180^(@) , then the path of the particle is

In case of a projectile motion, what is the angle between the velocity and acceleration at the highest point?