1. PHYS-101PHYS-101 I8 Graphing the Motion of a ProjectileNEBRASKA WESLEYAN UNIVERSITYFALL 2010-2011 DEAN SIEGLAFF BOB FAIRCHILD NATHANIEL CUNNINGHAM of 8 1 ANNOUNCEMENTS Join immediately. Enter your student ID number. Power down the responder before returning to the duffle. Start homework as soon as possible (get stuck early). See links to PRS slideshows on schedule page.

2. PHYS-101PHYS-101 I8 Graphing the Motion of a ProjectileNEBRASKA WESLEYAN UNIVERSITYFALL 2010-2011 DEAN SIEGLAFF BOB FAIRCHILD NATHANIEL CUNNINGHAM of 8 2 1 of 3 A person hanging onto a mast attached to the bed of a railway flat car releases a steel ball 5 m above a bucket at bed level. The car, ball, and people are all moving uniformly with speed v = 5 m/s as shown. Assume g = 10 m/s 2. After it is released, the ball will (ignoring atmospheric drag): 1.Fall 1 m behind the bucket. 2.Fall 2 m behind the bucket. 3.Fall 5 m behind the bucket. 4.Fall into the bucket. v

3. PHYS-101PHYS-101 I8 Graphing the Motion of a ProjectileNEBRASKA WESLEYAN UNIVERSITYFALL 2010-2011 DEAN SIEGLAFF BOB FAIRCHILD NATHANIEL CUNNINGHAM of 8 3 2 of 3 Ball A is thrown straight upward. Ball B is simultaneously launched at an angle above the horizontal. Both reach the same maximum altitude. Ignoring atmospheric drag, ball B comes back down (reaches the original altitude) 1.before ball A. 2.simultaneously with ball A. 3.after ball A. 4.at time relative to A that is indeterminate without knowing the angle of launch. vAvA path vBvB A B

4. PHYS-101PHYS-101 I8 Graphing the Motion of a ProjectileNEBRASKA WESLEYAN UNIVERSITYFALL 2010-2011 DEAN SIEGLAFF BOB FAIRCHILD NATHANIEL CUNNINGHAM of 8 4 3 of 3 A battleship simultaneously fires two shells at enemy ships. If the shells follow the trajectories shown, which ship gets hit first? 1.A 2.Both at the same time 3.B 4.Need more information Eric Mazur’s Peer Instruction, Prentice Hall, 1997, p. 110.

5. PHYS-101PHYS-101 I8 Graphing the Motion of a ProjectileNEBRASKA WESLEYAN UNIVERSITYFALL 2010-2011 DEAN SIEGLAFF BOB FAIRCHILD NATHANIEL CUNNINGHAM of 8 5 ANNOUNCEMENTS Join immediately. Enter your student ID number. Power down the responder before returning to the duffle. Start homework as soon as possible (get stuck early). See links to PRS slideshows on schedule page.

6. PHYS-101PHYS-101 I8 Graphing the Motion of a ProjectileNEBRASKA WESLEYAN UNIVERSITYFALL 2010-2011 DEAN SIEGLAFF BOB FAIRCHILD NATHANIEL CUNNINGHAM of 8 6 1 of 3 A person hanging onto a mast attached to the bed of a railway flat car releases a steel ball 5 m above a bucket at bed level. The car, ball, and people are all moving uniformly with speed v = 5 m/s as shown. Assume g = 10 m/s 2. After it is released, the ball will (ignoring atmospheric drag): 1.Fall 1 m behind the bucket. 2.Fall 2 m behind the bucket. 3.Fall 5 m behind the bucket. 4.Fall into the bucket. v

7. PHYS-101PHYS-101 I8 Graphing the Motion of a ProjectileNEBRASKA WESLEYAN UNIVERSITYFALL 2010-2011 DEAN SIEGLAFF BOB FAIRCHILD NATHANIEL CUNNINGHAM of 8 7 2 of 3 Ball A is thrown straight upward. Ball B is simultaneously launched at an angle above the horizontal. Both reach the same maximum altitude. Ignoring atmospheric drag, ball B comes back down (reaches the original altitude) 1.before ball A. 2.simultaneously with ball A. 3.after ball A. 4.at time relative to A that is indeterminate without knowing the angle of launch. vAvA path vBvB A B

8. PHYS-101PHYS-101 I8 Graphing the Motion of a ProjectileNEBRASKA WESLEYAN UNIVERSITYFALL 2010-2011 DEAN SIEGLAFF BOB FAIRCHILD NATHANIEL CUNNINGHAM of 8 8 3 of 3 A battleship simultaneously fires two shells at enemy ships. If the shells follow the trajectories shown, which ship gets hit first? 1.A 2.Both at the same time 3.B 4.Need more information Eric Mazur’s Peer Instruction, Prentice Hall, 1997, p. 110.