Energy Concepts and Simple Machines

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Energy Concepts and Simple Machines by Mind Map: Energy Concepts and Simple Machines

1. Power

1.1. Power is the rate at which work get done.

1.2. Power = Work / Time taken (Watts)

1.3. Examples: how fast you carry a box into the house

1.4. Simple machines have a lot of power when they can get jobs done efficiently

2. Work

2.1. Work occurs when an outside force causes an object to move.

2.2. Work = Force * Distance (joules)

2.3. Examples: when you kick a soccer ball and it goes into the goal

2.4. Simple machines do work when they cause an object to move.

3. Mechanical Advantage

3.1. Mechanical advantage tells us how much a machine multiplies a force of increases the distance.

3.2. Actual MA = output force / input force

3.3. Ideal MA = input distance / output distance

3.4. Examples: how much easier it is to bring a box up a ramp rather than climbing up stairs.

3.5. Mechanical advantage can tell us what simple machine will be the most effective to use for a specific task.

4. 1st Class Levers

4.1. Examples: screwdriver

5. 2nd Class Levers

5.1. Examples: wheelbarrow

6. 3rd Class Levers

6.1. Examples: baseball bat, hockey stick, golf club

7. Inclined Planes

7.1. A simple machine that makes it easier to move objects up of down in elevation rather that stairs.

7.2. Example: wheelchair entrance, ramp onto a moving van

7.3. Input distance-length of ramp

7.4. Output distance-height of ramp

8. Wedge

8.1. You can use a wedge to split something apart.

8.2. Examples: axe

9. Screw

9.1. Is used to hold things together

9.2. Examples: a screw

10. Wheel and Axle

10.1. Helps you get from place to place on public transportation.

10.2. Examples: wheels on car or bus

11. Pulley

11.1. Helps move heavy things to a higher elevation easily.

11.2. Examples: a pulley