A car of maas M is moving on a horizontal circular path of radius r. At an instant its speed is v and is increasing at a rate a.
A. The acceleration of the car is towards the centre of the path
B. The magnitude the frictional force on the car is greater than `(mv^2)/r`.
C. The friction coefficient between the ground and the car is not less than `a/g`.
D. The friction coefficient between the ground and the car is `mu=tan^-1 v^2/rg`
