Question

A car is driven round a curved path of radius 20m without the danger of skidding.The co-efficeient off friction betwen the tyres off the can and the surface off the curved path is.to.what is the maximum speed for safe driving?​

Answer 1

Correct option is B)

Frictional force= centrifugal force

fmg=

R

mv

2

where,

f=coefficient of friction

m=mass of vehicle (kg)

g=acceleration due to gravity (m/s

2

)

v=speed of vehicle (m/s)

R=radius of curve (m)

f=

gR

v

2

0.5=

10×18

v

2

v

2

=0.5×10×18

v=

90

v=9.45m/s=9.45×

5

18

=34.02kmph

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sorry but I think this is rong