एक कार 2π rad/s के कोणीय वेग से वृत्तीय गति कर रही है। इसका आवर्तकाल होगा:

What is the increasing order of centripetal accelerations of particles moving along circular paths with the following radii and tangential velocities respectively? (K) r = 0.4 m, v = 2 m/s (L) r = 1 m, v = 3 m/s (M) r = 0.6 m, v = 4 m/s (N) r = 0.2 m, v = 1 m/s (O) r = 2.0 m, v = 5 m/s

Ranjan is driving a race car on a circular racetrack of radius 200 m banked at an angle of 10°. If the coefficient of friction between the wheels and the road is 0.2, find the optimum speed of the race car to avoid wear and tear on its tyres (take g = 9.8 m/s2).