what is work? occurs when a force causes an object to move what is force? a push or a pull on an...
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What is WORK?Occurs when a FORCE causes an object to moveWhat is FORCE?A PUSH or a PULL on an object
What is a Simple Machine? A tool that helps make work easierA machine makes work easier by changing the size or direction (or both) of a force
The FORCE and OBJECT have to go the SAME directionWORKWORK
Machines do NOT save work. They just make work EASIER
The SAME amount of work is still doneHave you ever used a ramp to load a heavy object into a pick-up truck?
Types Of Simple MachinesAll machines are made from these 6 simple tools:1. Lever2. Inclined plane3. Wedge4. Screw5. Wheel and axle6. Pulley
PulleysA simple machine consisting of a wheel that holds a rope changes the direction and/or amount of force needed to lift an object3 types of pulleys:1. Fixed Pulley 2. Movable Pulley3. Block and Tackle
What is a Pulley?A pulley consists of a rope wrapped around a grooved wheel.The rope of chain is wrapped around the wheel, and one end is attached to the load.The other end is pulled to move the load.
Why Use a PulleyA pulley can change either the size or the direction of a force.Pulley SystemsMore than one pulley can be used in a pulley system to reduce the force needed even more. The more pulleys in a system, the greater the distance you will have to pull the rope.
A simple machine that is a straight, slanted surfaceThe longer the inclined plane is compared to its height, the easier it is to make to the tophttp://www.youtube.com/watch?v=pG_kT565-XQ
What is an INCLINED PLANE?
An inclined plane is a simple machine with a flat slanted surface.
Inclined planes reduce the force needed and to make work easier.The longer the plane the greater the distance and the less force needed.
Some examples of an inclined plane are
Simple Machines Reflection
PulleyInclined PlanesDefinitionDraw at least 3 real world examples of a pulleyWrite 1 sentence for each picture explaining how it makes work easierDefinitionDraw at least 3 real world examples of inclined planesWrite 1 sentence for each picture explaining how it makes work easier