Question

The blue ball is moving with uniform circular motion in the direction shown by the curved arrow in the diagram below.
In the tables below the diagram, which combination of arrows shows the correct direction of velocity and of acceleration for the ball when the ball is at the location shown in the diagram?

• A. $Velocity\leftarrow ;Acceleration\uparrow$
• B. $Velocity\leftarrow ;Acceleration\leftarrow$
• C. $Velocity\leftarrow ;Acceleration\downarrow$
• D. $Velocity\leftarrow ;Acceleration\to$
• E. $Velocity\uparrow ;Acceleration\downarrow$

Answer 1

The correct option is A $Velocity\leftarrow ;Acceleration\uparrow$

The velocity at any point in a uniform circular motion is given by tangent to that point in the direction of motion . In the given diagram as the movement is in left direction therefore velocity of ball will also be in left direction .

Now as it is a uniform motion it means speed is constant hence tangential acceleration is zero , ball has only centripetal acceleration , directed toward the center of circular path i.e. in vertically upward direction , given by option A .