Question

in what ways are a lever,an inclined plane and a fixed pulley are alike​

Answer 1

Pulley: A machine with a grooved wheel that holds a rope or cable, it makes lifting things easier. Lever: A machine that has a rod that pivots at a fixed point called a fulcrum, there are 3 types, they can make it easier to lift, pry, or weigh things.

Answer 2

bodies on this system has always force mg or mgsintheta or mgcostheta in downward  direction