A motorcycle is moving at a constant speed v when it encounters a circular hill of radius r = 420 m. The operator and motorcycle combined have mass m = 153 kg.
(a) What speed in m/s does the motorcycle have if the operator feels weightlessness (i.e., has an apparent weight of zero) at the top of the hill?
![1542_R.png](https://secure.tutorsglobe.com/CMSImages/1542_R.png)