A1.5 kg orange falls from a tree and hits the ground in 0.75s. what is the speed of the orange just before it hits the ground?

It is either a  proton or a neutron im almost positive. hope this .

Does this have a b c d option or no 

Ruth ford over turned thomsons model in 1911 with his well known gold foil experiment in which he demonstrated that the atom has a tiny heavy nucleus rutherford designed an experiment to use the alpha particles emitted by a radio active element as probes to the unseen world of atomic structure. hey hope this