Question

On a dry road the maximum safe speed for vehicle moving on curved road is 30 kilometre per hour. After heavy showers , the maximum safe speed for a Same road was 18 kilometre per hour , the ratio of the coefficient of friction for the dry road and to that of weight road is

Answer 1

Answer:

Required centripetal force is provided by the frictional force,therefore,

μN=

R

mv

2

N=mg

μmg=

R

mv

2

μ

2

mg=

R

mv

2

2

μ

1

mg=

R

mv

1

2

μ

2

μ

1

=(

V

2

V

1

)

2

=(

5

2

10

)

2

μ

2

=

2

μ

1

∴μ

2

=μ/

2

Explanation:

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