Flash Cards 10
What is work?
Work is done on an object when the object moves in the same direction in which the force is exerted.
What is the formula of work and how to calculate it?
The amount of work done on an object can be determined by multiplying force times distance. Work = Force x Distance
What is power?
Power is the rate at which work is done on an object. Power equals the amount of work done on an object in a unit of time.
What is the formula of power and how to calculate it?
Power is calculated by dividing the amount of work by the amount of time required to do the work. Power = Work/Time
What are simple machine?
Simple machines are machines that help by making work easier.
What is mechanical advantage?
Mechanical advantage is a measure of how much a force is increased by using a tool or machine.
What are the six types of simple machines?
The inclined plane, the wedge, the screw, the lever, the wheel and axle, and the pulley.
What is efficiency?
Efficiency is the use of less energy to perform the same task or produce the same result.
What is energy conservation?
Energy conservation is the decision and practice of using less energy.
What is energy transformation?
Energy transformation means the changing of energy from one type to another.
What are the different forms of energy?
Energy: ability to do work
Chemical: from chemical bonds
Electrical: moving electrons
Mechanical: moving things (parts)
Heat: moving molecules
Nuclear: from atom’s nucleus
Light (Solar): moving photons
Sound: vibrating objects
Potential: stored energy
Kinetic: motion energy
What is renewable energy?
Renewable energy is energy that comes from a source that won’t run out.
What is nonrenewable energy?
A nonrenewable resource is a substance that is used up more quickly than it can replace itself.
What is potential energy?
Potential energy is stored energy.
What is kinetic energy?
Kinetic energy is energy in moving things.
