An atheletic completes a circular loop moving with maximum constant speed in 10 sec. what is the radius r (in m) of the loop if friction coefficient between his shoes and ground is 0.8. fill `r/10` in OMR sheet. Take `pi^(2)=10`.

Answer

2

Explanation

`v=sqrt(mu rg)`
`v=wr`
`(2pi)/T xx r=sqrt(mug)`
r=20 cm