Question

27. A person is driving a vehicle at a uniform speed of 8ms-'on a level curved track of radius 8 m. The
coefficent of static friction between tyres and road is 0.1. Take g = 10ms 2. Choose the incorrect
statement.
(a) A person will slip if v2 > 10 ms
(b) A person will not slip if v? <8ms
(c) A person will not slip if 12> 8ms!
(d) A person will not slip if y2 = 8 ms​

Answer 1

Answer :

Correct option is

B

A person will slip if v

2

>5ms

−1

Person will slip if centripetal force

r

mv

2 is greater than frictional force μmg where m is mass off vehicle, v is velocity, r is radius (5m) and μ is coefficient of static friction (0.1), g is acceleration due to gravity (m/s

2

).

Therefore condition of slipping

r

mv

2

>μmg

i.e. v

2

>μrg

i.e. v

2

>5