Simple and Not Simple
The purpose of a simple machine
What is to make work easier?
Give an example of a first-class lever
What is a seesaw?
(scissors, scale, etc.)
The two types of pulleys
What are fixed and moveable pulleys?
Give an example of an inclined plane
What is a wheelchair ramp?
Or stairs, sloping roads or paths, ramp for loading trucks, a ladder, a roller coaster track etc.
A wedge turns an input force into this kind of output
What is transforming a pushing input into a splitting output force?
Machines with many parts
What are complex machines?
The fixed point that a lever rotates around
What is a fulcrum?
Give an example of a moveable pulley
What is a zipline?
A wheel and axle acts as a modified lever. This is the part of the simple machine that acts as the fulcrum of the lever
What is the axle?
The way that a screw changes an input force
What is transforming a rotational force into linear motion?
Simple definition of mechanical advantage
What is how a machine changes the input force?
What is the ratio of the output force to the input force?
Demonstrate an example of a second-class lever (include the parts of the lever)
Examples: pushing a wheelbarrow, opening a door, etc.
How a moveable pulley affects the effort to move a load
What is cutting the effort in half?
The way an inclined plane makes work easier
What is by reducing the effort needed to lift heavy loads over the length of the incline?
Mechanical advantage formula for a wedge
MA = "Length" / "Thickness"
This must be true of an electric circuit for electricity to flow
What is the circuit being closed?
Demonstrate an example of a third-class lever (include the parts of the lever)
What is swinging a bat?
(Biceps, tweezers, broom, shovel, mop, etc.)
The formula used to calculate the mechanical advantage of a pully system
MA = 2n (number of moveable pulleys)
MA = m (number of ropes supporting the load)
The formula to calculate the mechanical advantage of an inclined plane
MA = "Length" / "Height"
How to make a wedge and a screw from inclined planes
What are placing two incline planes back-to-back?
What is wrapping an inclined plane around a cylinder?
The general equation for calculating mechanical advantage
MA = "Output Force" / "Input Force"
MA = "Load" / "Effort"
Formula for the mechanical advantage of a lever
MA = "Effort Arm" / "Load Arm"
The name of the set of both fixed and moveable pulleys
The formula to calculate the mechanical advantage of a wheel and axle
MA = "Wheel Radius" / "Axle Radius"
Mechanical advantage formula for a screw
MA = "Circumference" / "Pitch"
"Pitch is the distance between the threads"