Which sentence best describes frustration? a. when you can't achieve your goal because you had a poor plan b. when you achieve your goals despite certain events c. when you can't achieve your goal due to events beyond your control d. when you can't achieve your goal because you are not trying hard

Asap and show ! a 14 kg rock starting from rest free falls through a distance of 5.0 m with no air resistance. find the momentum change of the rock caused by its fall and the resulting change in the magnitude of earths velocity. earth mass is 6.0 * 10^24 kg. show your work assuming the rock earth system is closed.