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PHY 241
Your 'cq_1_12.1' report has been received. Scroll down through the document to see any comments I might have inserted, and my final comment at the end.
** CQ_1_12.1_labelMessages **
Masses of 5 kg and 6 kg are suspended from opposite sides of a light frictionless pulley and are released.
What will be the net force on the 2-mass system and what will be the magnitude and direction of its acceleration?
answer/question/discussion: ->->->->->->->->->->->-> :
F_net = 6(9.8) - 5(9.8) = 9.8 N
a = 9.8 / 11 = .9 m/s^2 in the direction of the 6 kg mass
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If you give the system a push so that at the instant of release the 5 kg object is descending at 1.8 meters / second, what will be the speed and direction of motion of
the 5 kg mass 1 second later?
answer/question/discussion: ->->->->->->->->->->->-> :
v_0 = -1.8 m/s
`dt = 1 s
v_f = -1.8 + .9(1) = -.9 m/s or .9 m/s in the direction of the 5 kg mass
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During the first second, are the velocity and acceleration of the system in the same direction or in opposite directions, and does the system slow down or speed up?
answer/question/discussion: ->->->->->->->->->->->-> :
During the first second, velocity and acceleration are in opposite directions, and the system is slowing down
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&#Very good responses. Let me know if you have questions. &#