3. How does a fixed pulley act as a machine?
O It changes the direction and the size of the input force.
O It changes neither the size nor the direction of the input force.
O It changes the direction of the input force only.
O It changes the size of the input force only.

change tension

see the picture for the vector

the magnitude of the vector by pythagorean theorem

r = √( (-10)^2 + (3)^2 ) = √109

magnitude = √109 units

the direction angle between vector and x-axis is

tan^(-1)(3/10) = 16.699

so the direction is approximately 16.7 degrees north of west

inverse v=i*r

nice nice