i'm not really sure about this answer, because i didn't find it in my book. i think i'm correct. please check:

10. A wrench uses the principle of a(n)__________ in its operation.
a. lever
b. inclined plane
c. pulley
d. wheel and axle

B?

3 answers

I think it's a lever, but wait for one of the science teachers to respond.

alright

lever it is.