#$&*
Phy 241
Your 'cq_1_04.1' report has been received. Scroll down through the document to see any comments I might have inserted, and my final comment at the end.
** **
The problem:
A ball is moving at 10 cm/s when clock time is 4 seconds, and at 40 cm/s when clock time is 9 seconds.
• Sketch a v vs. t graph and represent these two events by the points (4 sec, 10 cm/s) and (9 s, 40 cm/s).
answer/question/discussion: ->->->->->->->->->->->-> (start in the next line):
Graph is increasing to the right
#$&*
• Sketch a straight line segment between these points.
answer/question/discussion: ->->->->->->->->->->->-> (start in the next line):
#$&*
• What are the rise, run and slope of this segment?
answer/question/discussion: ->->->->->->->->->->->-> (start in the next line):
points = (4s , 10cm/s) & (9s , 40cm/s)
rise = 40cm/s - 10cm/s = 30 cm/s
run = 9s - 4s = 5s
slope = Rise/Run = 30cm/s/5s = 6cm/s^2
#$&*
• What is the area of the graph beneath this segment?
answer/question/discussion: ->->->->->->->->->->->-> (start in the next line):
Area of trapezoid = .5(b)(h1 +h2)
= .5(5s)(10cm/s + 40cm/s)
=.5(5s)(50cm/s)
=.5(250cm) = 125cm = Area
#$&*
*#&!*#&!
&#Very good responses. Let me know if you have questions. &#