Phy 121
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Masses of 5 kg and 6 kg are suspended from opposite sides of a light
frictionless pulley and are released.
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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: ->->->->->->->->->->->-> scussion:
force = mass * acceleration
49 N = 5kg * 9.8m/s
58.8 N = 6kg * 9.8m/s
Magnitude= 9.8 N
Direction of 6 kg weight
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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: ->->->->->->->->->->->-> scussion:
It will move in the other direction with a speed of 8 m/s
#$&*
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During the first second, are the velocity and acceleration of
the system in the same direction or in opposite directions, and does the
system slow down or speed up?
answer/question/discussion: ->->->->->->->->->->->-> scussion:
The forces are in differnt directions and the system speeds up.
#$&*
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10 mins
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&#Please compare your solutions with the expanded discussion at the link
Solution
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