Asked by wes
What work is done by a friction force acting on an object?
Select one:
a. Always negative
b. Always positive
c. May be positive or negative depending on the choice of coordinate system
d. Always zero
Select one:
a. Always negative
b. Always positive
c. May be positive or negative depending on the choice of coordinate system
d. Always zero
Answers
Answered by
Henry
a. Always negative.
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