What is the smallest radius of a curve on a horizontal road , at which a cyslist can travel if his speed is 36 km / hour and the angle of inclination is `45 ^(@)` ?(g =`10m//s^(2)`)
A
`25m`
B
`20m`
C
`15m`
D
`10m`
Text Solution
Verified by Experts
The correct Answer is:
D
`tan theta = ( v^(2) )/( r g) ` ` therefore r= ( v^(2))/(g tan theta ) = ( 10xx10)/(10xx tan 45^(@))= 10 m`
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