Question

an athlete complete one round of circular track of radius r in 40s what will be displacement at end of two minutes

Answer 1

Answer:

2 minute=120sec

number of rounds=120/40=3 (complete round)

therefore the starting and the ending points are same

displacement=0

Answer 2

The athlete completes one round of the track in 40 seconds.

2 minutes = 120 seconds = 40 x 3 seconds

Meaning, the athlete will complete three rounds of the circular track in 120 seconds, that is, two minutes. This indicates that his initial and final position after locomotion at that point of time are coincident.

Hence, the athlete's displacement at the end of two minutes from starting would be zero