a wedge a pulley an inclined plane a wheel and axle
I am hesitating between 4 options to answer the following question, which option should I choose?
Question: A person must lift a heavy load of bricks to the top of a building. Which simple machine is best used for this task?
Possibilities:
- a wedge
- a pulley
- an inclined plane
- a wheel and axle

a pulley