Screws and wedges are simple machines that help us use force and move things. But they have some challenges when we try to use them in real life.

1. Force Boosting:

   • Screws change twisting motion into straight motion. This change helps us increase force. But screws can be tricky because they create friction, which slows things down. This means a lot of energy can be wasted just trying to get the screw to work because of this friction.

2. Wedges:

   • Wedges work by pushing force onto a smaller area. This helps to split or lift things. However, wedges aren’t always effective. If the angle of the wedge is too steep, it takes more force to use it compared to a flatter wedge. This can make it harder to cut or lift heavy items.

3. Ways to Improve:

   • Engineers can help screws work better by adding lubricants, which reduce friction. They can also pick materials that work better together. For wedges, choosing the right angle can make them more effective, so we use less force when we need to lift or cut something.

In short, screws and wedges are useful machines that can make work easier. But there are challenges in using them, and careful engineering can help solve these problems.