Answer to Question #141060 in Physics for Aryan Patel

Question #141060
A 3kg object falls off an 9 m tall ledge.Due to friction it is only going 10 m/s at the ground.Calculate efficiency

g=9.8
1
Expert's answer
2020-10-30T13:10:11-0400
η=0.5mv2mghη=0.5(10)2(9.8)(9)=0.57\eta=\frac{0.5mv^2}{mgh}\\\eta=\frac{0.5(10)^2}{(9.8)(9)}=0.57


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