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Physics on the image
please help​

Physics on the image please help​-example-1
User Leosh
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1 Answer

22 votes
22 votes

Answer:

a) 0.5 J

b) 99.5%

Step-by-step explanation:

a) The energy being wasted is the difference between the starting potential energy and the ending kinetic energy:

100 J -99.5 J = 0.5 J

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b) If we consider the efficiency to be the ratio of ending kinetic energy to beginning potential energy, it is ...

99.5 J/(100 J) = 99.5/100 = 99.5%

User Dmitrij Kuba
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3.4k points