Atruck runs into a pile of sand, moving 0.80 m as it slows to a stop. the magnitude of the work that the sand does on the truck is 6.0 times 10^5 j. (a) determine the average force that the sand exerts on the truck. (b) did the sand do positive or negative work? (c) how does the average force change if the stopping distance is doubled? indicate any assumptions you made.

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