A simple machine is the simplest tool that uses leverage to make more force. Many people use simple machines every day of their life. I use a simple machine when I ride my bike. My bike uses three simple machines: the wheel, lever, and pulley.
A piano also has a simple machine. Each key is a lever. There are 88 keys in a piano. There are many other machines in our house. Blinds have pulleys in them. Door latches have levers. Scissors and knives have wedges. A toilet has a lever, so it is also a simple machine. A wagon is another simple machine. We use our wagon to carry rocks from our backyard to our front yard. I'm thankful for simple machines.
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