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Ch5 HW2 S2008

# Ch5 HW2 S2008 - Ch5 HW2 S2008 10:29 AM Web Assign Ch5 HW2...

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4/25/08 10:29 AM Ch5 HW2 S2008 Page 1 of 5 http://www.webassign.net/[email protected]/[email protected] Ch5 HW2 S2008 (Homework) KRISTIN SEILOFF PHYS 2211 M & N Spring 08, section N05, Spring 2008 Instructor: Jennifer Curtis Description Work and change in particle energy Instructions Reading: Sections 5.3-5.4 Web Assign Current Score: 20 out of 20 Due: Wednesday, February 20, 200812:00 PM EST 1. 4/4 points | 1/4 submissions An object which is originally at location < -17 , 0, 0 > m moves to location < -20 , 0, 0> m as shown in the diagram above. While it is moving it is acted on by a constant force of < 21 , 0, 0 > N. How much work is done on the object by this force? W = -63 -63 J As a result, the kinetic energy of the object decreases decreases A different object moves from location < -20 , 0, 0 > m to location < -17 , 0, 0 > m, as shown above. While it is moving it is acted on by a constant force of < 21 , 0, 0 > N. How much work is done on the second object by this force? W = 63 63 J As a result, the kinetic energy of the object increases increases

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4/25/08 10:29 AM Ch5 HW2 S2008 Page 2 of 5 http://www.webassign.net/[email protected]/[email protected] 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.
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Ch5 HW2 S2008 - Ch5 HW2 S2008 10:29 AM Web Assign Ch5 HW2...

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