Question

Calculate the average velocity of tip of second's hand of a clock in 30 s which is 21 cm long

Answer 1

Displacement = 2r = 2*21*10⁻² m= 4.2*10⁻¹ m

v= d/t= 4.2*10⁻¹ / 30 = 0.014 m/s in 180 deg