At this radius, what is the magnitude of the net force that maintains circular motion exerted on the pilot by the seat belts, the friction
against the seat, and so forth?
Answer in units of N

Farmer a has a deep well and needs a lot of water for her animals and crops. her neighbor, farmer b, has a shallower well. he needs less water than farmer a because his farm is smaller. in years of drought, sometimes farmer b can't get any water from his wells. what can farmer b do to decrease the likelihood of his well running dry?