- #1

Shivam

- 32

- 2

- Homework Statement
- A car of mass 1000kg is moving on a horizontal circle of radius 200m. Coefficient of friction between ground and tyres is 0.2.Find the friction force acting on the tyres if the car is moving with speed of 30m/s.

(1)1000N

(2)20N

(3)2000N

(4)None of these

Answer according to book is 3rd option.

- Relevant Equations
- V(max)=√Rgu (u is coefficient of friction, also v is maximum safe speed at which car can take turn safely)

1). I calculated maximum safe velocity using the equation -

V(max)=√200x10x0.2

=20m/s

So the speed at which car is traveling is greater than the safe speed.. So the car should skid. So why 4th option is not correct ?

V(max)=√200x10x0.2

=20m/s

So the speed at which car is traveling is greater than the safe speed.. So the car should skid. So why 4th option is not correct ?