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The Two Masses in the Figure Are Released from Rest

Question 68

Multiple Choice

The two masses in the figure are released from rest.After the 3.0-kg mass has fallen 1.5 m,it is moving with a speed of 3.8 m/s.What is the change in mechanical energy done on the system during this time interval by the frictional force on the 2.0 kg mass? The two masses in the figure are released from rest.After the 3.0-kg mass has fallen 1.5 m,it is moving with a speed of 3.8 m/s.What is the change in mechanical energy done on the system during this time interval by the frictional force on the 2.0 kg mass? A) -12 J B) -17 J C) -20 J D) -8.0 J E) -28 J


A) -12 J
B) -17 J
C) -20 J
D) -8.0 J
E) -28 J

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