2. A 48 kg girl is initially at rest on a 2.8 kg skateboard that is not moving. The girl then steps off the front of the skateboard with a velocity of 1.3 m/s to the right. What is the final velocity of the skateboard?

Match each vocabulary term to its definition. 1. electrons neutral subatomic particles found in the nucleus of the atom 2. neutron lowest energy position of an electron in an atom 3. photon the path of an electron around the nucleus of an atom 4. ground state negatively charged, subatomic particles 5. protons packet of energy of specific size 6. element substance with only one type of atom 7. orbital positively charged, subatomic particles found in the nucleus of the atom