A pulley is used to raise a heavy crate. With the pulley it only takes an effort force of 223 N to provide a resistance force of 1784 N. What is the mechanical advantage of this pulley?

You are your friend move a new refrigerator into his kitchen. you apply a horizontal force of 252 n in the negative x direction to try and move the 56 kg refrigerator. the coefficient of static friction is 0.61. (a) how much static frictional force does the floor exert on the refrigerator? give both magnitude (in n) and direction. magnitude n direction (b) what maximum force (in n) do you need to apply before the refrigerator starts to move?