Question

Which statement below is true concerning perpetual motion?
A) It can occur because input energy is more than output.
B) It can occur because output energy is more than input.
C) It cannot occur because output energy is less than input.
D) It cannot occur because input energy is less than output.

Answer 1

Perpetual motion cannot occur because no matter how you design something you cannot attain an efficiency of 1. Remember, efficiency is calculated as the ratio of output to input. \[E_{ff}=\frac{output}{input}\]Typically, the energy you put into it is greater than it's output because there are inevitable losses (heat, friction, drag, etc).

Answer 2

So my answer would be C?

Answer 3

Yes

Answer 4

Aw alright I get it thanks for the help mane