Machines

Today we learned that work is done when a force causes a change in the position or motion of an object. Like when you race some one, if you want to beat them, then you have to do more work in order to pass that finish line. You can't be first without power! Power is the rate at which work is done. The greater the power, the greater your works done. Most work require alot of power, but the use of machines can make it easier. Machines can range from wheelbarrows, to screwdrivers, to pullies. They all make every thing in our lives easier!