0 |iylearn.ivytech.edu/courses/73754&quizzes1431555;/take uI graviy AH1 DQuestio

Question

0 |iylearn.ivytech.edu/courses/73754&quizzes1431555;/take uI graviy AH1 DQuestion 6 10 pts my mg Three objects with masses m,-9 kg, m2-3 kg and m3-17 kg, respectively, are attached by strings over frictionless pulleys as shown in the figure. The coefficient of kinetic friction between m2 and the table is 0.3. If ma moves downward a distance of 5 m, use energy concepts to find the speed of m3. Use 9.8 m/s2for the value of gravity. DQuestion 7 10 pts Distance avoied e ^ 40) 10:14AM /11/2017 Search Windows

Explanation / Answer

By conservation of energy

(1/2)(m1+m2+m3)Vf2=[m1(Y1i-Y1f)+u*m2(Y2i-Y2f)+m3(Y3i-Y3f)]g

(1/2)*(9+3+17)*Vf2=[9(-5)+3*0+17*(5)]*9.8

29Vf2=784

Vf=5.2 m/s

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