Friction and other forces really change how we understand the work-energy principle in everyday life.
Friction: This is a force that works against movement. For instance, when you slide a book across a table, friction slows it down. That means not all the energy you used goes into moving the book forward.
Other Forces: There are also things like air resistance. When you ride a bike, you have to use extra energy to push against the wind. This can make you go slower.
So, in simple terms, real-life forces waste some energy. This shows us that not all the energy we use turns into useful work!
Friction and other forces really change how we understand the work-energy principle in everyday life.
Friction: This is a force that works against movement. For instance, when you slide a book across a table, friction slows it down. That means not all the energy you used goes into moving the book forward.
Other Forces: There are also things like air resistance. When you ride a bike, you have to use extra energy to push against the wind. This can make you go slower.
So, in simple terms, real-life forces waste some energy. This shows us that not all the energy we use turns into useful work!