How to Use a Crowbar to Remove Nails

Think of e the handles as a beam. So, so one side of the see saw is longer than the other side. You can use the longer side to lift heavier loads, right? And it also changes the direction of the applied force. The second class is more like a wheelbarrow which involves two simple machines. They have the fulcrum at one end, then you have the input force and output force. Third class leavers are the ones, to me, that are the most counter intuitive. It doesn't sound likeand and why would you want to use that?