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Unformatted text preview: Ch3 HW3 (Homework) BRANDON JARROTT FELDKAMP PHYS 2211, section M, Fall 2008 Instructor: Jennifer Curtis Web Assign Current Score: 24 out of 24 Due: Friday, September 12, 2008 09:00 AM EDT Description Iterative prediction of motion; gravitational force; electric force; reciprocity Instructions Reading: Sec. 3.7-3.12 (and review Sec. 3.4-3.6) The due date for this assignment is past. Your work can be viewed below, but no changes can be made. 1. [MI2 03.P.49] 8/8 points (a) In outer space, far from other objects, block 1 of mass 60 kg is at position < 8 , 7 , 0 > m, and block 2 of mass 1200 kg is at position < 18 , 7 , 0 > m. What is the (vector) gravitational force acting on block 2 due to block 1? It helps to make a sketch of the situation. grav = < -4.82e-8-4.82e-08 , 0 , 0 > N (b) At 4.3 seconds after noon both blocks were at rest at the positions given above. At 4.6 seconds after noon, what is the (vector) momentum of block 2? 1 = < -1.45e-8-1.45e-08 , 0 , 0 > kgm/s (c) At 4.6 seconds after noon, what is the (vector) momentum of block 1? 2 = < 1.45e-8 1.45e-08 , 0 , 0 > kgm/s At 4.6 seconds after noon, which one of the following statements is true? Block 1 and block 2 have the same speed. Block 2 is moving faster than block 1....
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