Rutherford overturned Thomson's model in 1911 with his well-known gold foil experiment in which he demonstrated that the atom has a tiny and heavy nucleus. Rutherford designed an experiment to use the alpha particles emitted by a radioactive element as probes to the unseen world of atomic structure.
Velocity = The speed and direction that an object is moving at
The force of friction is zero.
Using F = m a = the force needed is 6 N which means no friction can be acting.