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.
• 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: ->->->->->->->->->->->-> : 49N+58.8N=107.8N on the system and 9.8N pulling downward at 1m/s^2.
• 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: ->->->->->->->->->->->-> : It will still be going down but at .8m/s^2. The next second the 5kg mass would begin moving upward at .2m/s^2 accelerating at 1m/s^2.
• 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: ->->->->->->->->->->->-> : The velocity is moving downward and the acceleration is moving upward thus slowing the system down.
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20minutes
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