Work, Power and Machines
Simple Machines
What is Energy?
Conservation of Energy
Math Skills
100
Done only when force causes a change in the motion of an object.
What is Work?
100
The most basic machines.
What is Simple Machines
100
A measure of the ability to do work.
What is Energy
100
Energy cannot be created or destroyed.
What is Law of Conservation of Energy?
100
Force x distance
What is the Work Equation?
200
Newtons and Meters Units
What is Joules
200
First-class lever, Second-class lever, Third-class lever
What is the Three Classes of Levers?
200
Energy that's stored in a stretched slingshot or a rubber band.
What is Potential energy?
200
When the flow of energy into and out of a system is small enough that it can be ignored.
What is a Closed System?
200
Work divided by time
What is the Power Equation?
300
Defined as the rate at which work is done.
What is Power
300
Multiple pulleys sometimes put together in a single unit.
What is Block and Tackle
300
The energy that an object has because it is in motion.
What is kinetic energy?
300
To measure how much useful work a machine does.
What is Efficiency?
300
Output force divided by input force equal to input distance divided by output distance
What is Mechanical Advantage?
400
The amount of power required to do 1 J of work in 1 s.
What is a Watt?
400
Changes both the magnitude and the direction of force.
What is An inclined plane?
400
The sum of the potential energy and the kinetic energy in a system.
What is mechanical energy?
400
A machine designed to keep on going forever without any input of energy.
What is Perpetual Motion Machines?
400
Mass x free fall acceleration x height
What is Gravitational Potential Energy Equation?
500
Defined as the ratio between the output force and the input force.
What is the Mechanical Advantage?
500
A machine that combines two or more simple machines.
What is a Compound machine?
500
Light energy travels from the sun to Earth across empty space.
What is electromagnetic waves?
500
Energy goes through a series of changes into kinetic energy and turning back to potential energy.
What is Energy Transformations?
500
Useful work output divided by work input
What is Efficiency Equation?
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