Answer:
equation of motion for Bill is

equation of motion for Ted is

Explanation:
Taking downward position positive and upward position negative
g = 9.8 m/s^2
equation of motion for Bill is




equation of motion for Ted is






Answer:
Last option in the list of possible answers, with U235 and n (neutron) in the left (originators) of the reaction diagram.
Explanation:
Uranium 235 (which is a fissile isotope of uranium) plus slow neutrons is what produce the chain reaction that feeds nuclear reactors.