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Which of these is an example of an undesirable effect of friction?
a. copying notes on the board
b. energy loss in machines
c. keeping our balance
d. walking down the street

will mark brainliest

Sagot :

Answer:

b. energy loss in machines

Explanation:

It is an undesirable effect because it causes loss in energy in a machine which most likely requires a lot of energy to function. Therefore, it is undesirable as the machine will not function properly.

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