If a motorcycle is driven around a vertical loop (radius = 12 meters), what is the minimum speed at the top of

Question

If a motorcycle is driven around a vertical loop (radius = 12 meters), what is the minimum speed at the top of the loop to ensure the cycle is held to the loop?

Answer 1

The centripetal acceleration must equal gravity

Ac = v^2/r = 9.81
v = sqrt(9.81 x 12) = 10.85 m/s = 39.06 km/h