An athlete completes one round of a circular track of diameter 100 m in 20 s. What will be the displacements after 1 minute and 10 s, respectively ?

The athlete completes one round of a circular track in 20 seconds. Displacement is the shortest straight-line distance between the initial and final positions. After 1 minute (60 seconds), the athlete completes exactly 3 full revolutions (60/20 = 3). Since the athlete returns to the starting point after any integer number of rounds, the displacement is 0 m. After 10 seconds, the athlete completes exactly half a round (10/20 = 0.5). In a circular path, completing half a round places the athlete at the diametrically opposite point from the start. The displacement in this case is equal to the diameter of the track. Given the diameter is 100 m, the displacement after 10 seconds is 100 m. Thus, the displacements are 0 m and 100 m respectively.