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Ch1 HW3 2008

Ch1 HW3 2008 - Ch1 HW3 2008...

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Ch1 HW3 2008 (Homework) BRANDON JARROTT FELDKAMP PHYS 2211, section M, Fall 2008 Instructor: Jennifer Curtis Web Assign Current Score: 26 out of 26 Due: Wednesday, August 27, 2008 09:00 AM EDT Description Relativistic and non-relativistic momentum; Change in Momentum. Reading : 1.8-2.2 Instructions Answer all questions carefully before submitting the assignment, then correct any errors that are reported. The due date for this assignment is past. Your work can be viewed below, but no changes can be made. 1. [MI2 01.X.42] 1/1 points A good sprinter can run 100 meters in 10 seconds (a speed of 10 m/s). What is the magnitude of the momentum of a sprinter whose mass is 67 kg and who is running at a speed of 10 m/s? = 670 670 kg·m/s Solution or Explanation For speeds small compared to c , momentum is approximately mv . 2. [MI2 01.X.43] 1/1 points A baseball has a mass of about 155 g. What is the magnitude of the momentum of a baseball thrown at a speed of 96 miles per hour? (Note that you need to convert mass to kilograms and speed to meters/second. A mile is 1.6 kilometers or 1600 meters.) = 6.61 6.61 kg·m/s Solution or Explanation For speeds small compared to c , momentum is approximately mv . Mass is 0.155 kg. Speed is ( 96 mi/hr)*(1600 m/mi)*(1 hr/(3600 s)).

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