A car is moving along the circle x 2 + y 2 = a 2 in the anti-clockwise direction with a constant speed. The x - y plane is a rough horizontal stationary surface. When the car is at the point (a cos 
, a sin 
), the unit vector in the direction of the friction force acting on the car is
A
B
C
D
Text Solution
Verified by ExpertsThe correct answer is:
C
The direction of the friction force should be towards the centre of the circle which is 
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