1. PHYS-1600/2000PHYS-1600/2000 I6 Curved Path MotionNEBRASKA WESLEYAN UNIVERSITYFALL 2014-2015 DEAN SIEGLAFF NATHANIEL CUNNINGHAM of 14 1 Today’s Puzzler: You are given two slow-burning fuses (like the “wick” for a firecracker or a stick of dynamite), and a box of matches. The fuses are not identical, and burn at different rates. In fact, neither one burns a a constant rate. All you know about each fuse is that each takes exactly one hour to burn from end to end – though the first half might burn in 5 minutes and the second half in 55 minutes. How can you use these two fuses to tell when 45 minutes have passed? 1.I have the answer! 2.I can’t figure it out. source: shared at physicsforums.com

2. PHYS-1600/2000PHYS-1600/2000 I6 Curved Path MotionNEBRASKA WESLEYAN UNIVERSITYFALL 2014-2015 DEAN SIEGLAFF NATHANIEL CUNNINGHAM of 14 2 ANNOUNCEMENTS Handed-in HW now available. Check MP solutions on schedule page.

3. PHYS-1600/2000PHYS-1600/2000 I6 Curved Path MotionNEBRASKA WESLEYAN UNIVERSITYFALL 2014-2015 DEAN SIEGLAFF NATHANIEL CUNNINGHAM of 14 3 1 of 3 A bumblebee is flying along the path of motion shown. Which of the vectors shown best represents the displacement of the bumblebee over the time t 1 to time t 2 ? x r1r1 y r2r2 231 4

4. PHYS-1600/2000PHYS-1600/2000 I6 Curved Path MotionNEBRASKA WESLEYAN UNIVERSITYFALL 2014-2015 DEAN SIEGLAFF NATHANIEL CUNNINGHAM of 14 4 2 of 3 A bumblebee is flying along the path of motion shown. Which of the vectors shown best represents the average acceleration of the bumblebee over the time t 1 to time t 2 ? x v1v1 y 231 4 v2v2

5. PHYS-1600/2000PHYS-1600/2000 I6 Curved Path MotionNEBRASKA WESLEYAN UNIVERSITYFALL 2014-2015 DEAN SIEGLAFF NATHANIEL CUNNINGHAM of 14 5 3 of 3 Which of the following are true about the kinematic vectors of a body moving along a curved path of motion? 1.Both the velocity and the acceleration point in the direction of motion. 2.The velocity points in the direction of motion but the acceleration does not. 3.The acceleration points in the direction of motion but the velocity does not. 4.Neither the velocity nor the acceleration point in the direction of motion.

6. PHYS-1600/2000PHYS-1600/2000 I6 Curved Path MotionNEBRASKA WESLEYAN UNIVERSITYFALL 2014-2015 DEAN SIEGLAFF NATHANIEL CUNNINGHAM of 14 6 ANNOUNCEMENTS Handed-in HW now available. Check MP solutions on schedule page.

7. PHYS-1600/2000PHYS-1600/2000 I6 Curved Path MotionNEBRASKA WESLEYAN UNIVERSITYFALL 2014-2015 DEAN SIEGLAFF NATHANIEL CUNNINGHAM of 14 7

8. PHYS-1600/2000PHYS-1600/2000 I6 Curved Path MotionNEBRASKA WESLEYAN UNIVERSITYFALL 2014-2015 DEAN SIEGLAFF NATHANIEL CUNNINGHAM of 14 8

9. PHYS-1600/2000PHYS-1600/2000 I6 Curved Path MotionNEBRASKA WESLEYAN UNIVERSITYFALL 2014-2015 DEAN SIEGLAFF NATHANIEL CUNNINGHAM of 14 9

10. PHYS-1600/2000PHYS-1600/2000 I6 Curved Path MotionNEBRASKA WESLEYAN UNIVERSITYFALL 2014-2015 DEAN SIEGLAFF NATHANIEL CUNNINGHAM of 14 10 Etc.

11. PHYS-1600/2000PHYS-1600/2000 I6 Curved Path MotionNEBRASKA WESLEYAN UNIVERSITYFALL 2014-2015 DEAN SIEGLAFF NATHANIEL CUNNINGHAM of 14 11 1 of 3 A bumblebee is flying along the path of motion shown. Which of the vectors shown best represents the displacement of the bumblebee over the time t 1 to time t 2 ? x r1r1 y r2r2 231 4

12. PHYS-1600/2000PHYS-1600/2000 I6 Curved Path MotionNEBRASKA WESLEYAN UNIVERSITYFALL 2014-2015 DEAN SIEGLAFF NATHANIEL CUNNINGHAM of 14 12 2 of 3 A bumblebee is flying along the path of motion shown. Which of the vectors shown best represents the average acceleration of the bumblebee over the time t 1 to time t 2 ? x v1v1 y 231 4 v2v2

13. PHYS-1600/2000PHYS-1600/2000 I6 Curved Path MotionNEBRASKA WESLEYAN UNIVERSITYFALL 2014-2015 DEAN SIEGLAFF NATHANIEL CUNNINGHAM of 14 13 3 of 3 Which of the following are true about the kinematic vectors of a body moving along a curved path of motion? 1.Both the velocity and the acceleration point in the direction of motion. 2.The velocity points in the direction of motion but the acceleration does not. 3.The acceleration points in the direction of motion but the velocity does not. 4.Neither the velocity nor the acceleration point in the direction of motion.

14. PHYS-1600/2000PHYS-1600/2000 I6 Curved Path MotionNEBRASKA WESLEYAN UNIVERSITYFALL 2014-2015 DEAN SIEGLAFF NATHANIEL CUNNINGHAM of 14 14 14141414 25252525 3333 PROJECTION SCREEN HAND IN TODAY’S ACTIVITY SHEETS 6666