A moving company wants to lift a piano to the second story of a house and has these three pulley set ups to choose from (the
piano would replace the weight pictured). Which would be the best choice and why?
Choice A would be the best because the pull motion is downward he will only use 1/2 of the force, so that
will be easier.
Choice C because the pulley changes the directions of the pull and reduces the amount of force needed,
even though the rope is pulled longer.
Either A or B because the force will be the same (half) and the amount of rope pulled is the same and the
directions does not matter.
Choice B would be the best, because you are pulling upwards using half of the force, so it would be
easier