Certainly! Here are the simple machines matched with their correct definitions:
1. Wheel and Axle:
- Definition: A shaft attached to the center of a wheel so both can rotate.
- Example: A doorknob where the axle is the shaft attached to the center of the wheel (the knob) to help rotate it easily.
2. Pulley:
- Definition: A grooved wheel with a rope or chain along the groove.
- Example: Using a pulley system to lift heavy objects by pulling down on one end of the rope while the object is lifted on the other end.
3. Inclined Plane:
- Definition: A sloped surface.
- Example: A ramp used to move heavy objects to a higher or lower level with less effort compared to lifting them straight up.
4. Lever:
- Definition: A bar that is free to pivot around a fixed point.
- Example: Seesaws at playgrounds where the board acts as a lever pivoting around the fixed point to allow movement up and down.
5. Wedge:
- Definition: An inclined plane with one or two sides.
- Example: A knife, where the blade is a wedge with one or two inclined planes that help cut through objects by concentrating force.
6. Screw:
- Definition: An inclined plane wrapped around a cylinder.
- Example: Screwing in a lightbulb where the threads on the screw act as an inclined plane wrapped around a cylinder, allowing it to be easily inserted or removed.
These simple machines make work easier by changing the direction or amount of force needed to perform a task. Each one has specific applications and benefits in various everyday scenarios.
