1 / 8

ANNOUNCEMENTS

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. 1 of 3.

guang
Download Presentation

ANNOUNCEMENTS

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  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. 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/s2. After it is released, the ball will (ignoring atmospheric drag): Fall 1 m behind the bucket. Fall 2 m behind the bucket. Fall 5 m behind the bucket. Fall into the bucket. v 2

  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) • before ball A. • simultaneously with ball A. • after ball A. • at time relative to A that is indeterminate without knowing the angle of launch. vB B A vA path path 3

  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? A Both at the same time B Need more information Eric Mazur’s Peer Instruction, Prentice Hall, 1997, p. 110. 4

  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. 5

  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/s2. After it is released, the ball will (ignoring atmospheric drag): Fall 1 m behind the bucket. Fall 2 m behind the bucket. Fall 5 m behind the bucket. Fall into the bucket. v 6

  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) • before ball A. • simultaneously with ball A. • after ball A. • at time relative to A that is indeterminate without knowing the angle of launch. vB B A vA path path 7

  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? A Both at the same time B Need more information Eric Mazur’s Peer Instruction, Prentice Hall, 1997, p. 110. 8

More Related