ch 6 hw 2

ch 6 hw 2 - Ch6 HW2 f10 Page 1 of 5 WebAssign Ch6 HW2...

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Web Assign Ch6 HW2 f10 (Homework) Ashlyn Baum Physics 303K, section B, Fall 2010 Instructor: Jim Chelikowsky Current Score : 15 / 26 Due : Sunday, October 10, 2010 11:30 PM CDT 1. 4/4 points Question: MI3 6.4.X.050 An object which is originally at location < -12 , 0, 0 > m moves to location < -7 , 0, 0> m as shown in the diagram above. While it is moving it is acted on by a constant force of < -29 , 0, 0 > N. How much work is done on the object by this force? W = -145 -145 J As a result, the kinetic energy of the object decreases decreases A different object moves from location < -7 , 0, 0 > m to location < -12 , 0, 0 > m, as shown above. While it is moving it is acted on by a constant force of < -29 , 0, 0 > N. How much work is done on the second object by this force? W = 145 145 J As a result, the kinetic energy of the object increases increases Solution or Explanation If the work done on a particle is negative, the kinetic energy of the particle decreases; if the work done is positive, the kinetic energy of the particle increases. 2. 4/4 points Question: MI3 6.4.X.051 The due date for this assignment is past. Your work can be viewed below, but no changes can be made. Page 1 of 5 Ch6 HW2 f10 11/21/2010 http://www.webassign.net/[email protected]/[email protected] ..

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A ball of mass 0.7 kg falls downward, as shown in the diagram above. Initially you observe it to be 4 m above the ground. After a short time it is just about to hit the ground. During this interval how much work was done on the ball by the gravitational force?
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ch 6 hw 2 - Ch6 HW2 f10 Page 1 of 5 WebAssign Ch6 HW2...

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