Answer the following question given this paragraph: 

automobile axle drives a wheel, which has a much larger diameter than the axle. The MA is less than 1. (c) An ordinary pulley is used to lift a heavy load. The pulley changes the direction of the force T exerted by the cord without changing its magnitude. Hence, this machine has an MA of 1.


Q: A pulley changes the direction of the force t exerted by the cord without changing its what?


A:
magnitude