The circular path has a radius of 1 km, with O as the center and R as the distance between the two points.
The biker is moving at a speed of 10 meters per second.
As a result, it is possible to say that the motion is a uniform circular motion at the point R.
As a result, R = 1000 metres.
v = 10 metres per second
Therefore, acceleration, ac = v2/R = 0.1 m/s2 along RO.