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An athelete completes one round of a cir...

An athelete completes one round of a circular track of radius `R` in 40 seconds. What will be the displacement at the end of ` 2 min. 20 second ?

A

Zero

B

2R

C

`2pi R`

D

`7 pi R`

Text Solution

Verified by Experts

The correct Answer is:
B
Time to complete one revolution = 40 sec
Total time ` = 2 xx 60 + 20 = 140 sec`
Number of revolution ` = 3 1/2`
Displacement = 2R.
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