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OpenStudy (anonymous):
The two masses in the figure are released from rest. After the 3 Kg mass has fallen 1.5 m , it moves with a speed 4 m/s . what is the change in mechanical energy done on the system during this time interval by frictional force on the 2 Kg mass?
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OpenStudy (anonymous):
no idea :DDD
OpenStudy (anonymous):
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