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Ch2 HW1 2008

# Ch2 HW1 2008 - Ch2 HW1 2008...

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Ch2 HW1 2008 (Homework) BRANDON JARROTT FELDKAMP PHYS 2211, section M, Fall 2008 Instructor: Jennifer Curtis Web Assign Current Score: 21 out of 21 Due: Wednesday, August 27, 2008 09:00 AM EDT Description System and surroundings; the Momentum Principle; net force; impulse Instructions Readings: Sections 2.1-2.3 The due date for this assignment is past. Your work can be viewed below, but no changes can be made. 1. [MI2 02.X.01.01] 1/1 points A ball moves in the direction of the arrow labeled g below. The ball is struck by a stick which briefly exerts a force on the ball in the direction of the arrow labeled a below. Which arrow best describes the direction of , the change in the ball's momentum? a a Solution or Explanation has the same direction as the applied force, since = t . 2. [MI2 02.X.00.01] 3/3 points You lift a heavy box. We'll consider this process for different choices of system and surroundings. (1) Choose the box as the system of interest. What objects in the surroundings exert significant forces on this system?

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