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Unformatted text preview: Physics 204A SECOND EXAM Chapters 1 - 7 Spring 2006 2 3. Charles "Gabby" Street was a catcher for the Washington Senators from 1909 to 1911. He reputedly caught a 145g baseball dropped from the top of the Washington Monument which is 152m tall. Modern wind tunnel measurements suggest that the maximum speed of a dropped baseball should be about 42.7m/s. Find (a)the work done by gravity on the falling ball, (b)the net work done on the ball during its fall and (c)the work done by air resistance during the fall. 4. Use energy methods to find the speed that the baseball in problem 3 would have struck the ground if there were no air resistance. Physics 204A SECOND EXAM Chapters 1 - 7 Spring 2006 3 5. The 52.0kg woman pictured at the right falls into the safety net and stretches it 0.500m. The net springs back and he flies through the third story window 9.00m above the net at a speed of 13.0m/s. Find (a)the height of the window she fell from and (b)the effective spring constant of the safety net....
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This note was uploaded on 03/11/2012 for the course PHYSICS 204A taught by Professor Kagan during the Fall '09 term at CSU Chico.
- Fall '09