1. PHYS-1600/2000PHYS-1600/2000 I1 Velocity and SpeedNEBRASKA WESLEYAN UNIVERSITYFALL 2014-2015 DEAN SIEGLAFF NATHANIEL CUNNINGHAM of 14 1 Today’s physics puzzler: You’re holding a bowling ball, while sitting in a boat, which is floating in a swimming pool. When you drop the ball overboard, the water level in the pool will: 1.rise a little. 2.fall a little. 3.stay the same. Go ahead and answer with your clicker!

2. PHYS-1600/2000PHYS-1600/2000 I1 Velocity and SpeedNEBRASKA WESLEYAN UNIVERSITYFALL 2014-2015 DEAN SIEGLAFF NATHANIEL CUNNINGHAM of 14 2 Announcements:

3. PHYS-1600/2000PHYS-1600/2000 I1 Velocity and SpeedNEBRASKA WESLEYAN UNIVERSITYFALL 2014-2015 DEAN SIEGLAFF NATHANIEL CUNNINGHAM of 14 3 1 of 3 Jogger B runs along a circular track at constant speed from point 1 to point 2. Jogger A runs at constant speed along the straight line joining 1 and 2. Both joggers leave 1 simultaneously, and arrive at 2 simultaneously. A’s speed is: 1.greater than B’s. 2.equal to B’s. 3.less than B’s. 4.incomparable to B’s without more information. PATH OF B PATH OF A 12

4. PHYS-1600/2000PHYS-1600/2000 I1 Velocity and SpeedNEBRASKA WESLEYAN UNIVERSITYFALL 2014-2015 DEAN SIEGLAFF NATHANIEL CUNNINGHAM of 14 4 2 of 3 Jogger B runs along a circular track at constant speed from point 1 to point 2. Jogger A runs at constant speed along the straight line joining 1 and 2. Both joggers leave 1 simultaneously, and arrive at 2 simultaneously. The magnitude of A’s average velocity is: 1.greater than that for B. 2.equal to that for B. 3.less than that for B. 4.incomparable to that for B without more information. PATH OF B PATH OF A 12

5. PHYS-1600/2000PHYS-1600/2000 I1 Velocity and SpeedNEBRASKA WESLEYAN UNIVERSITYFALL 2014-2015 DEAN SIEGLAFF NATHANIEL CUNNINGHAM of 14 5 3 of 3 A bicyclist follows the bike path starting at point 1 heading east at first. The path eventually leads back around to point 1. If the path length is 5 miles, and the cyclist completes the trip in 30 min, then the magnitude of the cyclist’s average velocity would be: 1.15 mph. (mph = miles/hour) 2.10 mph. 3.5 mph. 4.0 mph. PATH OF CYCLIST 1

6. PHYS-1600/2000PHYS-1600/2000 I1 Velocity and SpeedNEBRASKA WESLEYAN UNIVERSITYFALL 2014-2015 DEAN SIEGLAFF NATHANIEL CUNNINGHAM of 14 6 Announcements:

7. PHYS-1600/2000PHYS-1600/2000 I1 Velocity and SpeedNEBRASKA WESLEYAN UNIVERSITYFALL 2014-2015 DEAN SIEGLAFF NATHANIEL CUNNINGHAM of 14 7 PREFLIGHT #1

8. PHYS-1600/2000PHYS-1600/2000 I1 Velocity and SpeedNEBRASKA WESLEYAN UNIVERSITYFALL 2014-2015 DEAN SIEGLAFF NATHANIEL CUNNINGHAM of 14 8 Etc. PREFLIGHT #2

9. PHYS-1600/2000PHYS-1600/2000 I1 Velocity and SpeedNEBRASKA WESLEYAN UNIVERSITYFALL 2014-2015 DEAN SIEGLAFF NATHANIEL CUNNINGHAM of 14 9 EXIT #1

10. PHYS-1600/2000PHYS-1600/2000 I1 Velocity and SpeedNEBRASKA WESLEYAN UNIVERSITYFALL 2014-2015 DEAN SIEGLAFF NATHANIEL CUNNINGHAM of 14 10 EXIT #2

11. PHYS-1600/2000PHYS-1600/2000 I1 Velocity and SpeedNEBRASKA WESLEYAN UNIVERSITYFALL 2014-2015 DEAN SIEGLAFF NATHANIEL CUNNINGHAM of 14 11 1 of 3 Jogger B runs along a circular track at constant speed from point 1 to point 2. Jogger A runs at constant speed along the straight line joining 1 and 2. Both joggers leave 1 simultaneously, and arrive at 2 simultaneously. A’s speed is: 1.greater than B’s. 2.equal to B’s. 3.less than B’s. 4.incomparable to B’s without more information. PATH OF B PATH OF A 12

12. PHYS-1600/2000PHYS-1600/2000 I1 Velocity and SpeedNEBRASKA WESLEYAN UNIVERSITYFALL 2014-2015 DEAN SIEGLAFF NATHANIEL CUNNINGHAM of 14 12 2 of 3 Jogger B runs along a circular track at constant speed from point 1 to point 2. Jogger A runs at constant speed along the straight line joining 1 and 2. Both joggers leave 1 simultaneously, and arrive at 2 simultaneously. The magnitude of A’s average velocity is: 1.greater than that for B. 2.equal to that for B. 3.less than that for B. 4.incomparable to that for B without more information. PATH OF B PATH OF A 12

13. PHYS-1600/2000PHYS-1600/2000 I1 Velocity and SpeedNEBRASKA WESLEYAN UNIVERSITYFALL 2014-2015 DEAN SIEGLAFF NATHANIEL CUNNINGHAM of 14 13 3 of 3 A bicyclist follows the bike path starting at point 1 heading east at first. The path eventually leads back around to point 1. If the path length is 5 miles, and the cyclist completes the trip in 30 min, then the magnitude of the cyclist’s average velocity would be: 1.15 mph. (mph = miles/hour) 2.10 mph. 3.5 mph. 4.0 mph. PATH OF CYCLIST 1

14. PHYS-1600/2000PHYS-1600/2000 I1 Velocity and SpeedNEBRASKA WESLEYAN UNIVERSITYFALL 2014-2015 DEAN SIEGLAFF NATHANIEL CUNNINGHAM of 14 14 14141414 25252525 3333 PROJECTION SCREEN HAND IN TODAY’S ACTIVITY SHEETS 6666