Question

The angle between direction of motion and the direction of force causing uniform circular motion ____.

• A. always remain constant
• B. increases with time
• C. decreases with time
• D. varies with speed

Answer 1

The correct option is A always remain constant

In uniform circular motion the direction of motion is always tangential to the path which is caused by the force acting radially inwards.
Since the angle between the radius and tangent of a circle is always 90 degree hence it always remains constant.