A 500 MeV Alpha Particle Is Incident on a Lead Nucleus

Multiple Choice

A 5.00 MeV alpha particle is incident on a lead nucleus.Because of the Coulomb force between them,the alpha particle will only approach the nucleus to a minimum distance, .If the kinetic energy of the alpha particle is decreased,will the particle's distance of approach increase,or remain the same?

A) increase
B) decrease
C) remain the same