The Blendspace for Movement below has a lot of the information seen in class. Review at your leisure. Also, feel free to look at the information below!
Movement: Simple Machines
Learning Goal: We are learning how position, force and simple machines affect the movement of objects and people in our surrounding environments and how we can affect these movements.
- assess the impact on society and the environment of simple machines and mechanisms
- investigate mechanisms that include simple machines and enable movement
- demonstrate an understanding of movement and ways in which simple machines help to move objects
What is a force?
A simple answer to this question would be a push or pull to make something move.
What is friction?
Friction is a force that slows down moving things.
Smooth surfaces have less friction. Rough surfaces have more friction. Different types of materials produce more friction than others. Can you think of a few examples?
A wedge is a combination of two inclined planes to make a sharp point which is used to either lift or separate an object.
Example: teeth, knives, an axe, a doorstop, etc.
In essence, a screw is made of an inclined plane wrapped around a cylindrical object. A screw can be used to join, grip, lift or hold tight different objects. Examples: screw, gluestick, bottle cap, etc.
Wheel and Axle
A wheel is placed onto a rod which holds it in place (an axle). As the wheel rotates along this axle, we elevate an object above the ground reducing friction which makes pushing or pulling objects easier. Examples; carts, fan, clock, etc.
An inclined plane is a flat surface which connects to points of different heights. This makes it easier to move objects up and down. Examples: a ramp, a slide, etc.
A lever is a simple machine which pivots a long bar on a fulcrum to help us lift heavy loads. You apply effort (force) to to one end to lift the load on the other. Examples: scissors, stapler, see-saw, etc.
A pulley is made with a wheel on a fixed axle, and a groove along the edge of the wheel to guide a rope or cable. The more pulleys you add, the less effort needed. Examples: elevators/lifts, cranes, blinds, etc.