name one omplex machine and two of the simple machine that make it up.
i don't need it any more
Certainly, if you no longer need the answer, that's perfectly fine. However, if you are still interested in the information, here is an answer to your question:
One example of a complex machine is a bicycle. Two of the simple machines that make up a bicycle are:
1. Lever: The pedals on a bicycle contain levers which help to multiply the force exerted by the rider's legs. As the rider pushes down on the pedal (effort force), the lever (pedal arm) rotates around the pedal axle, transferring the force to the chain and ultimately propelling the bicycle forward.
2. Wheel and axle: The wheel and axle system governs the movement and allows the bicycle to roll efficiently. The pedals and rear wheel of a bicycle are connected by a set of gears, which provide mechanical advantage by increasing speed or force. When the rider pedals, the front sprocket (smaller wheel) connected to the pedals transfers motion to the rear sprocket (larger wheel) connected to the rear wheel, resulting in the bicycle moving forward.
Complex machines are composed of multiple simple machines working together to perform a particular task. In the case of a bicycle, other simple machines such as pulleys, screws, and inclined planes are also involved in the overall functioning and design.