1. PHYS-1600/2000PHYS-1600/2000 II2 Free Body AnalysisNEBRASKA WESLEYAN UNIVERSITYFALL 2014-2015 DEAN SIEGLAFF NATHANIEL CUNNINGHAM of 12 1 Today’s Puzzler: A pot of water is brought to a steady boil on a stove. A thin plastic cup of cool water is placed in the boiling water, but no part of the cup touches the pot. Will the water in the cup start to boil if you wait long enough? 1) Yes2) No (This can be tested at home…)

2. PHYS-1600/2000PHYS-1600/2000 II2 Free Body AnalysisNEBRASKA WESLEYAN UNIVERSITYFALL 2014-2015 DEAN SIEGLAFF NATHANIEL CUNNINGHAM of 12 2 Announcements

3. PHYS-1600/2000PHYS-1600/2000 II2 Free Body AnalysisNEBRASKA WESLEYAN UNIVERSITYFALL 2014-2015 DEAN SIEGLAFF NATHANIEL CUNNINGHAM of 12 3 1 of 3 Cart C is connected to hanging masses A and B by means of ropes and pulleys as shown. A and B are equal mass bodies. After being given the initial velocity shown, cart C will 1.speed up. 2.stay at the same speed. 3.slow down and stop. 4.slow down, stop, and reverse its direction C B A v

4. PHYS-1600/2000PHYS-1600/2000 II2 Free Body AnalysisNEBRASKA WESLEYAN UNIVERSITYFALL 2014-2015 DEAN SIEGLAFF NATHANIEL CUNNINGHAM of 12 4 2 of 3 Cart C is connected to hanging masses A and B by means of ropes and pulleys as shown. A is heavier than B. After being released into motion from rest, the tension in A’s rope will 1.Remain greater than that in B’s rope. 2.Become equal to that in B’s rope. 3.Become less than that in B’s rope. C B A

5. PHYS-1600/2000PHYS-1600/2000 II2 Free Body AnalysisNEBRASKA WESLEYAN UNIVERSITYFALL 2014-2015 DEAN SIEGLAFF NATHANIEL CUNNINGHAM of 12 5 3 of 3 A skydiver is falling with the parachute open. The rate of descent is a steady 8 m/s. We can conclude that the net force acting upon the skydiver is 1.upward. 2.zero. 3.downward. v

6. PHYS-1600/2000PHYS-1600/2000 II2 Free Body AnalysisNEBRASKA WESLEYAN UNIVERSITYFALL 2014-2015 DEAN SIEGLAFF NATHANIEL CUNNINGHAM of 12 6 Announcements

7. PHYS-1600/2000PHYS-1600/2000 II2 Free Body AnalysisNEBRASKA WESLEYAN UNIVERSITYFALL 2014-2015 DEAN SIEGLAFF NATHANIEL CUNNINGHAM of 12 7 II2 Exit Homework Problem #1

8. PHYS-1600/2000PHYS-1600/2000 II2 Free Body AnalysisNEBRASKA WESLEYAN UNIVERSITYFALL 2014-2015 DEAN SIEGLAFF NATHANIEL CUNNINGHAM of 12 8 II2 Exit Homework Problem #2

9. PHYS-1600/2000PHYS-1600/2000 II2 Free Body AnalysisNEBRASKA WESLEYAN UNIVERSITYFALL 2014-2015 DEAN SIEGLAFF NATHANIEL CUNNINGHAM of 12 9 II2 Exit Homework Problem #2

10. PHYS-1600/2000PHYS-1600/2000 II2 Free Body AnalysisNEBRASKA WESLEYAN UNIVERSITYFALL 2014-2015 DEAN SIEGLAFF NATHANIEL CUNNINGHAM of 12 10 1 of 3 Cart C is connected to hanging masses A and B by means of ropes and pulleys as shown. A and B are equal mass bodies. After being given the initial velocity shown, cart C will 1.speed up. 2.stay at the same speed. 3.slow down and stop. 4.slow down, stop, and reverse its direction C B A v

11. PHYS-1600/2000PHYS-1600/2000 II2 Free Body AnalysisNEBRASKA WESLEYAN UNIVERSITYFALL 2014-2015 DEAN SIEGLAFF NATHANIEL CUNNINGHAM of 12 11 2 of 3 Cart C is connected to hanging masses A and B by means of ropes and pulleys as shown. A is heavier than B. After being released into motion from rest, the tension in A’s rope will 1.Remain greater than that in B’s rope. 2.Become equal to that in B’s rope. 3.Become less than that in B’s rope. C B A

12. PHYS-1600/2000PHYS-1600/2000 II2 Free Body AnalysisNEBRASKA WESLEYAN UNIVERSITYFALL 2014-2015 DEAN SIEGLAFF NATHANIEL CUNNINGHAM of 12 12 3 of 3 A skydiver is falling with the parachute open. The rate of descent is a steady 8 m/s. We can conclude that the net force acting upon the skydiver is 1.upward. 2.zero. 3.downward. v

13. PHYS-1600/2000PHYS-1600/2000 II2 Free Body AnalysisNEBRASKA WESLEYAN UNIVERSITYFALL 2014-2015 DEAN SIEGLAFF NATHANIEL CUNNINGHAM of 12 13 14141414 25252525 3333 PROJECTION SCREEN 6666 HAND IN TODAY’S ACTIVITIES SHEETS