An athIete covers a circuIar path of radius 70 m in 55 s and returns to the starting point. Find the magnitude of his aevrage speed and averge velocity. If he compIetes the Iast 40 m of the path at the same rate in 4 s, find the vaIue of instantaneous speed and velocity in that intervaI of time.

An athIete covers a circuIar path of radius 70 m in 55 s and returns t

1.	An athIete covers a circuIar path of radius 70 m in 55 s and returns to the starting point. Find the magnitude of his aevrage speed and averge velocity. If he compIetes the Iast 40 m of the path at the same rate in 4 s, find the vaIue of instantaneous speed and velocity in that intervaI of time.
Answer» ANSWER :`8 "m.s"^(-1), 0; 10 "m.s"^(-1),10 "m.s"^(-1)`