Simple Machines

Starter

Give five examples of work from your everyday life. Remember work is a force moving an object a distance.

Review: Who doing Work

• Explain who is doing more work and why: a bricklayer carrying bricks and placing them on the wall of a building being constructed, or a project supervisor observing and recording the progress of the workers from an observation booth.

Review

• Direction: Match the following statement with work or power.

1.=Force x distance2.=Work divided by time3.Newton.meter4.Carrying a Box5.Lifting a Box

Categorize

• Direction: Copy the following table.

Voc wordDefinition Facts Types Examples

Directions: Classify the terms and statements under the correct heading in your table.

Simple Machine less effort screw Wheel and Axle screwdriverMakes work easy less time knife Wedge Corkscrew scissors Device that performs a task stairs Lever block and tackleChange the size of force arm Pulley Incline Plane wheelchair ramp

• Direction: Draw the following table. Write the six types of simple machines under the heading TYPE. Use the next slide to label the pictures according to the type.

Type Picture

a. Zipper

b. Wheel barrow

c. Screw

d. Hammere. ramp

d. Flag and Flag Pole

Complex Machine

How does this picture show complex machines?

What are the simple machines that make up this complex machine?

Mechanical Advantage

• Write the definition for Mechanical Advantage• Create a T-chart for Mechanical Advantage for

Force and mechanical advantage for distance using the notes provided on simple machines and mechanical advantage.

• T-chart should include:– Formula for MA=Force and MA=Distance– Definitions for output force, input force, distance

effort, and distance resistance.– Give one example of MA=force and MA=distance

Simple Machines and Mechanical Advantage

• Direction: Label as Input force or Output Force.

1.You lift a 200N object.2.A wedge applies 400N of force to a piece of

wood.3.You push 240N on a lever.4.You turn a screw with 30N of force.5.A pulley applies 48N of force up.

Exit Slip

• List five examples from your everyday life you would classify as one of the different simple machines

Simple Machines and Mechanical Advantage

• Direction: Label as distance effort or distance resistance.

1.You use an incline plane to lift a car up 4 meters.

2.You use a 10 meter ramp to raise up a car.3.You lift a 200kg object up 2meters.4.The distance you push down on a lever.5.The distance the object moves with a lever.