Simple Machines

1. Work

1.1. using a force to move an object a distance (when both the force and the motion of the object are in the same direction.)

1.2. Using force to move something

1.3. Formula: W=Fd

1.4. Joules

1.5. pushing a chair across the floor

1.6. Work relates to simple machines by helping us figure out how much work a machine does

2. Power

2.1. `the rate (energy amount per time period) at which work is done or energy converted.

2.2. P=D/T

2.3. Watts(W)

2.4. How much power someone uses to push a box 10 meters in 2 seconds

3. Mechanical Advantage

3.1. a measure of the force amplification achieved by using a tool,

3.2. Actual M.A formula: OPF/IPF Imaginary M.A. formula: IPD/OPD

3.3. No units

3.4. rolling a ball up a 2 foot ramp that is 3 feet tall.

4. 1st Class levers

4.1. First-class levers have the fulcrum placed between the load and the effort.

4.2. Crowbars or seasaws/ teetertotter

5. 2nd Class levers

5.1. Second-class levers have the load between the effort and the fulcrum. A wheelbarrow is a second-class lever.

5.2. The wheel’s axle is the fulcrum, the handles take the effort, and the load is placed between them.

6. 3rd Class levers

6.1. Third-class levers have the effort placed between the load and the fulcrum.

6.2. A hammer or the human forearm

7. Inclined Plane

7.1. a plane inclined at an angle to the horizontal.

7.2. Ramps or hills

8. Wedge

8.1. Two inclined planes joined back to back.

8.2. Forks

9. Screw

9.1. A screw is a simple machine made up of another simple machines. It is an inclined plane wrapped around a cylinder.

9.2. Jar lids, fan blades

10. Wheel and Axle

10.1. A wheel and axle has 2 parts to it. The wheel, and the axle!

10.2. Door knobs, rollerblades, or gears in a clock

11. Pully

11.1. A Pulley is a simple machine made up of a wheel and a rope.

11.2. Flag polls