* Input Force: A machine receives a force from a user or another source. This is the force we put into the machine.
* Output Force: The machine then uses this input force to produce an output force. This is the force the machine applies to its load.
Here's what makes machines useful:
* Amplify Force: Some machines increase the magnitude of the input force. For example, a lever can amplify your force to lift a heavy object.
* Change Direction: Other machines change the direction of the input force. For example, a pulley system can redirect your force to lift an object vertically.
* Increase Speed: Machines can also increase the speed of the output force. A bicycle uses your leg force to move the wheels at a faster speed.
Key Point: Machines don't create force. They simply use energy to transfer, modify, or redirect the force we apply to them.
