Levers
This rotates around a fixed point to form a lever
What is a rigid bar?
A lever rotates around this fixed point
What is a fulcrum?
An inclined plane with a long surface will have a ________ angle of incline?
The job will be _____________.
small
easier
The purpose of a simple machine
What is to make work easier?
Give an example of a first-class lever
What is a see-saw?
(scissors, light switch, etc.)
Pulleys make it possible to _______ and _________ loads.
raise
lower
A screw is a tool that ________ things together.
holds
The way that simple machines make work easier
What is changing the direction or size of force needed to do work?
What is a fulcrum?
Where and for what would you find a pulley?
In a house, the blinds for the window.
Name 3 wedges that exist in nature?
teeth
nails
claws
Machines with many parts are called
Complex machines
Demonstrate a second-class lever
Examples: standing on tip toes (calf muscles); pushing a wheelbarrow, opening a door, etc.
What happens when 2 or more pulleys are used together?
It multiplies the force to make it 2 times easier.
Provide two examples of an inclined plane.
Examples: slide on playground; handicapped ramp; a ladder; a roller coaster ride (track).
The number of simple machines
What is six?
Name 3 things a wedge can do?
Grate
Dig
Cut
Sharpen
Using simple machines gives you this when you perform work
What is mechanical advantage?