Gina wheels her wheelchair up a ramp using a force of 80 newtons . if the ramp has a mechanical advantage of 7 what is the output force in newtons for 50 points

The answer is 560 because 7 times 80 is 560. Please mark me as the brainliest.

Ohm's law tells you that i = v/r where v is equivalent voltage and r is equivalent resistance of the circuit
since all circuits have the same voltage, your question is really asking which circuit has the lowest total resistance, since the lower the resistance, the higher the current
circuit a has a resistance of 5 ohms; circuit c is in series so has a resistance of 10 ohms; circuit b is in parallel and therefore has a resistance of 2.5 ohms (review your notes on adding resistances in parallel and series); therefore b has the highest current