Questions
If a machine is lubricated with oil, then
a
the mechanical advantage of the machine increases.
b
the mechanical efficiency of the machine increases.
c
both its mechanical advantage and efficiency increases.
d
Its efficiency increases but its mechanical advantage decreases.
detailed solution
Correct option is B
When a machine is lubricated with oil friction decreases. Hence the mechanical efficiency of the machine increases.Talk to our academic expert!
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