1.

an athlete completes one round of a circular track of radius R in 40 minutes what will be its displacement at the end of 2 minute 20 seconds

Answer»

it's 40 min or sec

Total time duration in consideration : 2 min 40 secs = 160 secs

No of complete rounds in this time = 160/40 = 4 rounds

Therefore he will be exactly at the point where he started. Hencehis displacement will be 0, although he will cover a distance of 4 (2πR)



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