Answers LHS Physical Science Cumulative Exam — Cumulative examQuestion 1

1

QuizMultiple Choice

Cumulative Exam — Cumulative exam

Question 1 • LHS Physical Science

Bill does 1500 J of work on a lever, which is a simple machine. The lever does 1350 J of work on a stone.What is the efficiency of the lever?

Answer

A

0.9%

B

1.1%

C

90%

D

111%

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