Speed of a body in a uniform circular motion

• The boundary of a circle or the length of a circle is its circumference.
• The circumference of a circle of radius ‘r’ is given by 2πr.
• If an athlete takes t seconds to go once around the circular path of radius ‘r’, the velocity ‘v’ is given by

• When a stone tied to a thread rotated in a circular path with uniform speed is suddenly released, it moves along a straight line that is tangential to the circular path.

Reason:

• Once the stone is released, it continuous to move along the direction it has been moving at that instant.

Conclusion:

• The direction of motion is changed at every point when the stone moves along a circular path.