Why is the mechanical advantage of using a single pulley always 1? Assume there’s no friction. a) The input force is in a different direction than the output force. b) The input force is less than the output force. c) The input force is greater than the output force. c) The input force is equal to the output force.
The answer is C. Say you are pulling on a rope that goes over one frictionless pulley. You are essentially moving the mass but in a different direction than gravity, so there is no advantage or disadvantage.
