Simple Machines 1
This simple machine is used to separate an object apart.
Wedge
This is a rod or pole centered in the wheel that allows the wheel to turn around it.
Axle
An axe is an example of a...
Wedge
The work you do on a machine.
Input work
What is the efficiency when 5J is supplied to an alarm and 2J is transferred to sound energy?
Remember E= (Output/Input) x 100%
40%
This simple machine pivots around a fixed point.
Lever
A round object, attached to an axel needed to spin a force around
Wheel
A bolt is an example of...
Screw
The work a machine does on an object.
Output work
What is the efficiency when 120J is supplied to a toaster and 50J of energy is transferred to heat energy?
Remember E= (Output/Input) x 100%
41.7%
The point on a lever where the change in force is happening.
Fulcrum
This simple machine is used to reduce the amount of work necessary to lift huge amounts of weight or to lower them down.
Pulleys
A clothesline is an example of...
Pulley
The input and output distances show what relationship?
Ex: If the window washer pulls his rope very far, what happens to the platform?
They are inverse or opposite.
A lot of input = very little output distance.
What is the efficiency when 60J is applied to an LED lamp and 48J of light energy is given off?
Remember E= (Output/Input) x 100%
80%
This simple machine is a flat sloped surface
Inclined plane
This simple machine is really a twisted inclined plane.
Screw
A slide is an example of...
Inclined plane
The input work versus the output work has what kind of relationship?
Ex: The force of the man pulling vs the force acting on the platform?
Inverse or opposite relationship.
Very little input = A lot of output
What is the efficiency when a washing machine uses 263J and has an output of 142J?
Remember E= (Output/Input) x 100%
53.9%
There are 6 basic simple machines, name them.
What are wheel & axle, lever, inclined plane, wedge, pulley, and screw?
Multiple Simple Machines working together to perform an action.
Complex Machines (know some examples of complex machines for the quiz!)
A door handle is an example of a...
Which of Newton's three laws of motion does the input vs output forces and distances follow?
Newton's Second
True or False: The efficiency of work can sometimes be 100%
False