Question

A cyclist moving on a circular of Radius 40 M complete half Revolution in 40 seconds. His angular velocity is

Answer 1

C = 2 pi r is the circumference — 251 meters. v = D/t = 125.5 m/40 sec = 3.142 m/sec or 10.3 ft/sec or 7.027 mph or 11.2 km/hr. That’s pretty slow trundling — you could jog along with the cyclist.

Our earth tools along at 67,000 mph in its track. Lucky there’s no turbulence!