Simple Machinespart 1

Answer questions on page 56 of your notebook.

Take notes on page 57.

What goes in the notebook?

• Question 1: Warm-up: List all the machines you have used today before you arrived at this class

• The rest of the questions are in the slide show.

• Your notes should include these words:

• Machine• Work• Joule• Simple machine• Examples of simple

machines• Fulcrum• Input force• Output force

What is a machine?Something that savesyou work.

Doing laundry with no machine

This machine has nopower source

Laundry the modern way

Question 2: Which method of doing laundry requires themost work? Which onerequires the least work?Why do you think so?

What is work?• Work is force per

distance

• Formula: W = F x d

• Units: Joules

• What is a good way to

remember the units?

James Joule

Are jewels free?

NO! You have to WORK for them.

Simple Machines

• Do not have a power source

• Use only one motion

Inclined PlaneQuestion 3:If the force it takes to climb up the ramps is decreased by using an inclined plane,

Then what is increased?

Remember, work = force x distance

The Lever

The force you put into the machine

The force the machine gives you

The stationary point that thelever turns around

Question 4Name the fulcrum, the location of the input force, and the location of the output force on each of these levers, and

how each one can save you work.

A B

CD

See sawCrow bar

Wheel barrowpliers

to be continued…..