chp 2 hw 1

# chp 2 hw 1 - Ch2 HW1 f10 corrected Page 1 of 7 WebAssign...

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Web Assign Ch2 HW1 f10 corrected (Homework) Ashlyn Baum Physics 303K, section B, Fall 2010 Instructor: Jim Chelikowsky Current Score : 15.5 / 18 Due : Sunday, September 5, 2010 11:30 PM CDT 1. 1/1 points Question: MI3 2.2.X.028 A ball moves in the direction of the arrow labeled a in the figure. The ball is struck by a stick which briefly exerts a force on the ball in the direction of the arrow labeled c in the figure. Which arrow best describes the direction of , the change in the ball's momentum? c c Solution or Explanation 2. 3/3 points Question: MI3 2.3.X.044 You are lifting 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? Check all that apply. (2) Choose you and the box as the system of interest. What objects in the surroundings exert significant forces on this system? Check all that apply. The due date for this assignment is past. Your work can be viewed below, but no changes can be made. Δ Start from the Momentum Principle, Δ = net Δ t . Since Δ t is a scalar, the direction of the change in momentum Δ is the same as the direction of the net force net . You The box The floor None The Earth Page 1 of 7 Ch2 HW1 f10 corrected 11/21/2010 http:[email protected][email protected] ..

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(3) Choose you, the box, and the Earth as the system of interest. What objects in the surroundings exert significant forces on this system? Check all that apply. 3. 1/1 points The diagram shows the momentum of an object and the net force acting on it at some instant in time. After a short amount of time, which of the following statements is true about the magnitude of
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## This note was uploaded on 11/21/2010 for the course PHY 56665 taught by Professor Chelikowsky during the Fall '10 term at University of Texas.

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chp 2 hw 1 - Ch2 HW1 f10 corrected Page 1 of 7 WebAssign...

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