A spacecraft descends vertically near the surface of Planet X. An upward thrust of 32.0 kN from its engines slows it down at a rate of 1.20 m/s², but if an upward thrust of only 11.4 kN is applied, it speeds up at a rate of 0.80 m/s².
Apply Newton's second law to each case, slowing down or speeding up, and use this to find the spacecraft's weight near the surface of Planet.

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