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Which of the following examples describes mechanical efficiency? A. greasing a surface helps reduce friction OB. a longer lever helps lift more weight O C. a fixed pulley change…

Which of the following examples describes mechanical efficiency? A. greasing a surface helps reduce friction OB. a longer lever helps lift more weight O C. a fixed pulley change…
asked 76.9k views
5 votes
Which of the following examples describes mechanical efficiency?

A. greasing a surface helps reduce friction
OB. a longer lever helps lift more weight
O C. a fixed pulley changes the direction you
pull
D. pushing the object down a slope is less
work

asked
User Tonisha
by
7.6k points

2 Answers

5 votes
A...............is the answer
answered
User Yeqing Zhang
by
8.5k points
4 votes

Answer:

Hello

I think the first one is correct.

Step-by-step explanation:

answered
User Daniel Rusev
by
7.8k points
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